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  • {{#category_index:A|alternating-field demagnetization}}
    217 bytes (19 words) - 20:50, 5 March 2018
  • {{#category_index:D|dipole field}} ...the [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']] (q.v.).
    245 bytes (33 words) - 14:09, 11 October 2017
  • {{#category_index:E|Earth’s gravity field}} The field varies from about 978 000 mGal at the equator to 983 000 mGal at the poles.
    375 bytes (45 words) - 10:24, 16 March 2020
  • {{#category_index:E|Earth’s magnetic field}} ...nd [[Special:MyLanguage/Dictionary:normal_magnetic_field|''normal magnetic field'']].
    284 bytes (37 words) - 10:24, 16 March 2020
  • {{#category_index:E|E-field ratio telluric method}}
    206 bytes (22 words) - 13:33, 6 February 2017
  • {{#category_index:E|electric field}} ...es or a time-varying magnetic field. Unit is volts per meter. The electric field <math> {\mathbf E}</math> induced in a loop equals the negative time deriva
    1 KB (163 words) - 11:37, 31 July 2018
  • {{#category_index:E|external magnetic field}}
    197 bytes (22 words) - 14:42, 7 February 2017
  • {{#category_index:F|far-field}} ...3BB;=wavelength. Compare [[Special:MyLanguage/Dictionary:near-field|''near-field'']].
    572 bytes (77 words) - 08:15, 18 April 2017
  • {{#category_index:F|field}} ...tract or area containing valuable minerals, such as a coal field or an oil field; see [[Special:MyLanguage/Dictionary:resource|''resource'']]. <b>4</b>. Spa
    795 bytes (115 words) - 17:18, 30 October 2018
  • {{#category_index:F|field balance}} See [[Special:MyLanguage/Dictionary:Schmidt_field_balance|''Schmidt field balance'']].
    209 bytes (23 words) - 17:18, 30 October 2018
  • {{#category_index:F|field continuation}}
    196 bytes (19 words) - 20:58, 29 July 2018
  • {{#category_index:F|field-effect transistor (FET)}} ...ion, and low cost. A semiconducting device that uses a transverse electric field as input to vary its conductance and thus control its output current. Ideal
    474 bytes (65 words) - 21:02, 29 July 2018
  • {{#category_index:F|field file}}
    206 bytes (25 words) - 17:18, 30 October 2018
  • {{#category_index:F|field filter}}
    181 bytes (23 words) - 13:12, 1 March 2017
  • {{#category_index:F|field impedance}}
    187 bytes (19 words) - 19:27, 12 August 2018
  • {{#category_index:F|field intensity}} ...lectric field, force per unit charge (or voltage gradient). Also called <b>field strength</b>. Sometimes expressed as <b>flux density</b>, lines of force pe
    464 bytes (70 words) - 19:20, 22 January 2018
  • {{#category_index:F|field of view}}
    193 bytes (25 words) - 17:19, 30 October 2018
  • {{#category_index:F|field processing}}
    478 bytes (67 words) - 13:13, 1 March 2017
  • {{#category_index:F|field tape}} A magnetic tape containing geophysical data recorded in the field, as opposed to a processed tape on which the data have been modified by com
    278 bytes (39 words) - 13:13, 1 March 2017
  • {{#category_index:F|field timing}} ...usually displayed on a field monitor record as timing lines), on an analog field tape as a 100-Hz timing signal, and on digital tape as timing words or word
    488 bytes (73 words) - 17:19, 30 October 2018
  • {{#category_index:F|fixed field}}
    151 bytes (17 words) - 18:33, 16 January 2018
  • {{#category_index:F|free field}} Not relating to a preassigned or fixed field.
    192 bytes (23 words) - 18:00, 14 November 2017
  • {{#category_index:F|free-space field}} ...by conductors. See [[Special:MyLanguage/Dictionary:primary_field|''primary field'']].
    260 bytes (32 words) - 17:59, 14 November 2017
  • {{#category_index:G|geomagnetic field}} See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    225 bytes (27 words) - 22:21, 25 January 2018
  • {{#category_index:G|geothermal field}}
    281 bytes (34 words) - 11:24, 7 June 2018
  • {{#category_index:I|International Geomagnetic Reference Field (IGRF)}} ...armonics. The IGRF is subtracted from observed data to determine the local field.
    436 bytes (55 words) - 20:37, 27 February 2017
  • {{#category_index:M|magnetic field}} ...w surrounds an electric current. <b>H</b> is sometimes called the magnetic field. See Figure [[Special:MyLanguage/Dictionary:Fig_M-1|M-1]].
    3 KB (465 words) - 19:31, 30 July 2017
  • {{#category_index:M|magnetic field of the Earth}} ...[[Special:MyLanguage/Dictionary:Fig_M-2|M-2]]. See also ''normal magnetic field''.
    850 bytes (140 words) - 18:44, 1 August 2017
  • {{#category_index:N|near-field}} ...depths'']] (q.v.). Compare [[Special:MyLanguage/Dictionary:far-field|''far field'']]. See Sheriff and Geldart (1995, 48).
    857 bytes (119 words) - 04:25, 1 August 2017
  • {{#category_index:N|nondipole field}} See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    223 bytes (27 words) - 18:39, 18 March 2018
  • {{#category_index:N|normal magnetic field}} ...roughly aligned with the present-day field. Antonym: <b>reversed magnetic field</b>.
    797 bytes (110 words) - 15:22, 11 December 2017
  • {{#category_index:P|parallel field}} A uniform field in which current flow lines or equipotential surfaces are parallel.
    207 bytes (26 words) - 17:06, 8 November 2017
  • {{#category_index:P|potential field}} ...ch as gravity, magnetic, or electrical fields. For such fields, the vector field may be expressed as the gradient of some scalar potential or the curl of a
    416 bytes (59 words) - 12:54, 8 May 2019
  • {{#category_index:P|potential-field tilt}}
    198 bytes (21 words) - 14:47, 10 April 2019
  • {{#category_index:P|primary field}} The electromagnetic field that would be generated if the source were in free space.
    206 bytes (27 words) - 19:58, 11 July 2018
  • {{#category_index:R|radiation field}} The far-field term in electromagnetic radiation, whose amplitude falls off with distance
    231 bytes (28 words) - 17:09, 22 January 2018
  • {{#category_index:R|reversed magnetic field}} See [[Special:MyLanguage/Dictionary:normal_magnetic_field|''normal magnetic field'']].
    219 bytes (24 words) - 16:11, 27 July 2017
  • {{#category_index:R|rotary-field electromagnetic method}}
    222 bytes (23 words) - 14:51, 8 August 2017
  • {{#category_index:S|Schmidt field balance}} ...ife-edge. The torque of the magnet trying to align with the Earth&#x2019;s field is balanced by a gravitational torque because the magnetometer is not pivot
    380 bytes (57 words) - 09:46, 3 November 2017
  • {{#category_index:S|secondary field}} ...In methods where galvanic energization of the earth is used, the secondary field is that resulting from the difference between the actual current system in
    506 bytes (74 words) - 20:42, 9 March 2017
  • {{#category_index:S|static field}} The field of an electric dipole that falls off with distance ''r'' as 1/''r''<sup>3</
    212 bytes (29 words) - 10:49, 27 October 2017
  • {{#category_index:S|stationary field}} A physical field that does not vary with time.
    172 bytes (22 words) - 05:46, 30 October 2017
  • ...s]]) we'll talk about a widely used method of interpretation for potential-field data called Euler deconvolution. Our goal is to demonstrate its usefulness ...I is an integer number that is related to the homogeneity of the potential field and varies for different fields and source types (Stavrev and Reid, 2007)<r
    10 KB (1,472 words) - 16:09, 24 November 2017
  • ...in [[Öz Yilmaz|Oz Yilmaz's]] [[Seismic Data Analysis]] are examined using field data examples below. Application of statistical deconvolution to pre- and p We shall analyze field data with three different nearsurface characteristics. Specifically, near-s
    41 KB (6,230 words) - 17:19, 7 October 2014
  • ..., down to a specified datum ''D''. From the geometry of Figure 3.4-10, the field statics correction Δ''τ<sub>D</sub>'' can be computed by *[[Field data examples]]
    4 KB (595 words) - 11:28, 19 September 2014
  • Now consider the field data example in Figure 8.0-3a. Layer replacement will be done on these data
    7 KB (1,089 words) - 14:08, 1 October 2014
  • #REDIRECT [[Euler deconvolution of potential field data]]
    57 bytes (7 words) - 16:05, 5 December 2014
  • The [http://www.seg.org/web/foundation/programs/fieldcamps SEG Foundation Field Camp program] is intended to advance geophysics today and inspire geoscient ==List of field camps implemented by SEG Student Chapters==
    1 KB (151 words) - 18:03, 13 April 2015
  • 0 bytes (0 words) - 19:22, 7 February 2015
  • {{Infobox field camps
    393 bytes (40 words) - 10:57, 26 February 2015
  • 0 bytes (0 words) - 19:27, 7 February 2015
  • 0 bytes (0 words) - 19:25, 7 February 2015
  • {{Infobox field camps ...ining and financial support to help realizing this Indonesian-German Joint Field Camp 2012.
    12 KB (1,835 words) - 17:06, 3 September 2015
  • {{Infobox field camps ...Chapter - SGS Berlin & Potsdam Joint Field Camp 2008|Romanian-German Joint Field Camp in 2008]]. Their experiences and knowledge were of great profit for al
    8 KB (1,183 words) - 08:48, 31 August 2015
  • {{Infobox field camps ...- University of Bucharest SEG Student Chapter Joint Field Camp 2009|joint field camp in 2009]] which has been carried out in Germany.
    5 KB (793 words) - 08:46, 31 August 2015
  • {{Infobox field camps ...tudents travelled to Nizhny Novgorod to implement the Russian-German Joint Field Camp along with their Russian fellow students.
    13 KB (2,033 words) - 11:38, 21 September 2015
  • #REDIRECT [[Field camps]]
    25 bytes (3 words) - 16:37, 10 March 2015
  • {{Infobox field camps
    405 bytes (46 words) - 16:32, 10 March 2015
  • {{Infobox field camps | image = [[File:SGS-Highschool Field Camp 2011.jpg|300px]]
    11 KB (1,650 words) - 05:35, 8 September 2015
  • {{#category_index:S|secondary field}} ...In methods where galvanic energization of the earth is used, the secondary field is that resulting from the difference between the actual current system in
    419 bytes (66 words) - 19:21, 9 March 2017
  • {{#category_index:S|secondary field}}
    434 bytes (74 words) - 20:55, 9 March 2017
  • {{#category_index:P|potential field}} ...ch as gravity, magnetic, or electrical fields. For such fields, the vector field may be expressed as the gradient of some scalar potential or the curl of a
    357 bytes (53 words) - 05:11, 22 June 2019
  • ...effort will probably be required to achieve adequate data quality. Propose field methods and explain the bases for your proposals. | align="center" | [[Optimizing field layouts]]
    7 KB (991 words) - 13:40, 25 June 2019
  • {{#category_index:F|far-field}} ...3BB;=wavelength. Compare [[Special:MyLanguage/Dictionary:near-field|''near-field'']].
    513 bytes (71 words) - 08:15, 18 April 2017
  • 91 bytes (13 words) - 16:32, 20 May 2019
  • 413 bytes (68 words) - 07:46, 14 June 2017
  • 224 bytes (33 words) - 07:48, 14 June 2017
  • {{#category_index:R|reversed magnetic field}} See [[Special:MyLanguage/Dictionary:normal_magnetic_field|''normal magnetic field'']].
    160 bytes (18 words) - 16:11, 27 July 2017
  • {{#category_index:M|magnetic field}} ...w surrounds an electric current. <b>H</b> is sometimes called the magnetic field. See Figure [[Special:MyLanguage/Dictionary:Fig_M-1|M-1]].
    2 KB (437 words) - 19:32, 30 July 2017
  • 2 KB (170 words) - 17:38, 1 August 2017
  • {{#category_index:N|near-field}} ...depths'']] (q.v.). Compare [[Special:MyLanguage/Dictionary:far-field|''far field'']]. See Sheriff and Geldart (1995, 48).
    798 bytes (113 words) - 04:25, 1 August 2017
  • {{#category_index:M|magnetic field of the Earth}} ...[[Special:MyLanguage/Dictionary:Fig_M-2|M-2]]. See also ''normal magnetic field''.
    791 bytes (134 words) - 18:45, 1 August 2017
  • 548 bytes (18 words) - 18:51, 1 August 2017
  • ...肤效应深度'']] (q.v.)。请比较 [[Special:MyLanguage/Dictionary:far-field|''远场'']] 参考 Sheriff and Geldart (1995, 48).
    644 bytes (31 words) - 10:48, 2 August 2017
  • {{#category_index:R|rotary-field electromagnetic method}}
    163 bytes (17 words) - 14:51, 8 August 2017
  • 2 KB (456 words) - 13:15, 28 November 2020
  • 844 bytes (156 words) - 13:16, 28 November 2020
  • 716 bytes (109 words) - 11:39, 27 July 2020
  • {{#category_index:R|rotary-field electromagnetic method}}
    176 bytes (20 words) - 13:16, 17 April 2020
  • {{#category_index:R|reversed magnetic field}}
    162 bytes (19 words) - 10:49, 17 April 2020
  • {{#category_index:D|dipole field}} ...the [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']] (q.v.).
    186 bytes (27 words) - 14:09, 11 October 2017
  • 178 bytes (26 words) - 17:32, 19 August 2019
  • {{#category_index:S|static field}} The field of an electric dipole that falls off with distance ''r'' as 1/''r''<sup>3</
    153 bytes (23 words) - 10:49, 27 October 2017
  • {{#category_index:S|static field}}
    154 bytes (24 words) - 11:00, 27 October 2017
  • {{#category_index:S|stationary field}} A physical field that does not vary with time.
    113 bytes (16 words) - 05:46, 30 October 2017
  • {{#category_index:S|stationary field}}
    112 bytes (18 words) - 05:49, 30 October 2017
  • 138 bytes (21 words) - 17:09, 8 November 2017
  • {{#category_index:S|Schmidt field balance}} ...ife-edge. The torque of the magnet trying to align with the Earth&#x2019;s field is balanced by a gravitational torque because the magnetometer is not pivot
    320 bytes (51 words) - 09:47, 3 November 2017
  • {{#category_index:S|Schmidt field balance}}
    368 bytes (64 words) - 10:23, 3 November 2017
  • {{#category_index:F|free-space field}} ...by conductors. See [[Special:MyLanguage/Dictionary:primary_field|''primary field'']].
    201 bytes (26 words) - 10:43, 21 November 2017
  • {{#category_index:F|free field}}
    110 bytes (16 words) - 14:33, 23 June 2021
  • 162 bytes (20 words) - 14:14, 6 September 2019
  • {{#category_index:I|International Geomagnetic Reference Field (IGRF)}} ...armonics. The IGRF is subtracted from observed data to determine the local field.
    376 bytes (49 words) - 20:37, 27 February 2017
  • {{#category_index:F|field filter}}
    122 bytes (17 words) - 13:12, 1 March 2017
  • {{#category_index:F|field processing}}
    419 bytes (61 words) - 13:13, 1 March 2017
  • {{#category_index:F|field tape}} A magnetic tape containing geophysical data recorded in the field, as opposed to a processed tape on which the data have been modified by com
    219 bytes (33 words) - 13:13, 1 March 2017
  • {{#category_index:I|International Geomagnetic Reference Field (IGRF)}}
    445 bytes (67 words) - 20:34, 21 December 2019
  • {{#category_index:E|E-field ratio telluric method}}
    146 bytes (16 words) - 13:33, 6 February 2017
  • {{#category_index:E|Earth&#x2019;s gravity field}} The field varies from about 978 000 mGal at the equator to 983 000 mGal at the poles.
    340 bytes (41 words) - 10:26, 16 March 2020
  • {{#category_index:E|Earth&#x2019;s magnetic field}} ...nd [[Special:MyLanguage/Dictionary:normal_magnetic_field|''normal magnetic field'']].
    249 bytes (33 words) - 10:25, 16 March 2020
  • 206 bytes (27 words) - 10:25, 16 March 2020
  • 291 bytes (35 words) - 10:26, 16 March 2020
  • {{#category_index:E|E-field ratio telluric method}}
    145 bytes (18 words) - 21:41, 5 August 2019
  • {{#category_index:E|external magnetic field}}
    138 bytes (16 words) - 14:44, 7 February 2017
  • 105 bytes (12 words) - 07:40, 8 February 2017
  • ...dataset] spans the 1997-2006 period and contains data for the whole Norne Field.
    2 KB (233 words) - 05:32, 26 April 2016
  • 67 bytes (9 words) - 14:35, 22 June 2021
  • 146 bytes (22 words) - 17:12, 22 January 2018
  • 124 bytes (17 words) - 04:24, 9 June 2019
  • {{#category_index:F|field intensity}} ...lectric field, force per unit charge (or voltage gradient). Also called <b>field strength</b>. Sometimes expressed as <b>flux density</b>, lines of force pe
    405 bytes (64 words) - 05:19, 8 February 2018
  • 104 bytes (10 words) - 17:24, 24 March 2020
  • ...ndidad pelicular'']] (ver). Compárese [[Special:MyLanguage/Dictionary:far-field/es|''campo lejano'']]. Ver Sheriff y Geldart (1995, 48).
    857 bytes (133 words) - 21:40, 1 July 2020
  • 131 bytes (18 words) - 16:08, 14 July 2020
  • {{#category_index:P|parallel field}} A uniform field in which current flow lines or equipotential surfaces are parallel.
    148 bytes (20 words) - 08:17, 26 March 2018
  • {{#category_index:N|nondipole field}} See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    164 bytes (21 words) - 08:41, 26 March 2018
  • {{#category_index:F|fixed field}}
    92 bytes (11 words) - 08:56, 26 March 2018
  • {{#category_index:G|geomagnetic field}} See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    166 bytes (21 words) - 10:19, 28 March 2018
  • {{#category_index:A|alternating-field demagnetization}}
    158 bytes (13 words) - 10:19, 28 March 2018
  • {{#category_index:F|free field}} Not relating to a preassigned or fixed field.
    107 bytes (15 words) - 10:19, 28 March 2018
  • {{#category_index:R|radiation field}} The far-field term in electromagnetic radiation, whose amplitude falls off with distance
    172 bytes (22 words) - 10:20, 28 March 2018
  • {{#category_index:N|normal magnetic field}} ...roughly aligned with the present-day field. Antonym: <b>reversed magnetic field</b>.
    738 bytes (104 words) - 10:21, 28 March 2018
  • {{#category_index:G|geothermal field}}
    222 bytes (28 words) - 11:24, 7 June 2018
  • 221 bytes (28 words) - 11:26, 7 June 2018
  • {{#category_index:P|primary field}} The electromagnetic field that would be generated if the source were in free space.
    147 bytes (21 words) - 20:58, 11 July 2018
  • {{#category_index:F|field-effect transistor (FET)}} ...ion, and low cost. A semiconducting device that uses a transverse electric field as input to vary its conductance and thus control its output current. Ideal
    415 bytes (59 words) - 21:03, 29 July 2018
  • {{#category_index:F|field continuation}}
    137 bytes (13 words) - 21:59, 29 July 2018
  • {{#category_index:F|field continuation}}
    141 bytes (15 words) - 22:14, 29 July 2018
  • 420 bytes (66 words) - 16:39, 20 May 2019
  • {{#category_index:E|electric field}} ...es or a time-varying magnetic field. Unit is volts per meter. The electric field <math> {\mathbf E}</math> induced in a loop equals the negative time deriva
    949 bytes (143 words) - 13:37, 31 July 2018
  • 116 bytes (18 words) - 16:46, 7 August 2018
  • {{#category_index:F|field impedance}}
    128 bytes (13 words) - 23:27, 12 August 2018
  • 94 bytes (9 words) - 23:12, 23 August 2018
  • {{#category_index:E|electric field}}
    992 bytes (157 words) - 10:51, 29 November 2020
  • {{#category_index:F|field}} ...tract or area containing valuable minerals, such as a coal field or an oil field; see [[Special:MyLanguage/Dictionary:resource|''resource'']]. <b>4</b>. Spa
    710 bytes (107 words) - 17:18, 30 October 2018
  • {{#category_index:F|field file}}
    147 bytes (19 words) - 17:19, 30 October 2018
  • {{#category_index:F|field timing}} ...usually displayed on a field monitor record as timing lines), on an analog field tape as a 100-Hz timing signal, and on digital tape as timing words or word
    429 bytes (67 words) - 18:19, 30 October 2018
  • {{#category_index:F|field balance}} See [[Special:MyLanguage/Dictionary:Schmidt_field_balance|''Schmidt field balance'']].
    150 bytes (17 words) - 20:19, 30 October 2018
  • {{#category_index:F|field}}
    760 bytes (119 words) - 14:11, 22 June 2021
  • ...x03BB;=longitud de onda. Comparar con [[Special:MyLanguage/Dictionary:near-field|''campo cercano'']].
    522 bytes (80 words) - 13:03, 22 June 2021
  • 117 bytes (13 words) - 14:12, 22 June 2021
  • 128 bytes (19 words) - 20:38, 9 January 2019
  • 431 bytes (74 words) - 14:14, 22 June 2021
  • 99 bytes (16 words) - 20:44, 9 January 2019
  • 631 bytes (110 words) - 14:16, 22 June 2021
  • 4 KB (566 words) - 12:23, 14 February 2019
  • 77 bytes (2 words) - 04:42, 28 February 2019
  • 92 bytes (10 words) - 15:08, 10 April 2019
  • {{#category_index:P|potential field}}
    379 bytes (55 words) - 07:50, 14 September 2019
  • {{#category_index:P|potential field}} ...ch as gravity, magnetic, or electrical fields. For such fields, the vector field may be expressed as the gradient of some scalar potential or the curl of a
    357 bytes (53 words) - 14:55, 8 May 2019
  • Seismic field work is usually carried out in a uniform manner with group intervals everyw | align="center" | [[Selecting optimum field methods]]
    7 KB (996 words) - 13:42, 25 June 2019
  • {{#category_index:P|potential field}} ...ch as gravity, magnetic, or electrical fields. For such fields, the vector field may be expressed as the gradient of some scalar potential or the curl of a
    357 bytes (53 words) - 13:35, 22 July 2019
  • |Item=Field Office Desk
    358 bytes (52 words) - 10:56, 1 November 2019
  • |Item=Gravity Map (FreeAir Gravity Anomaly Field) ...esent, and Jason 2 2008–present). Objective: The Free-Air Gravity Anomaly Field is composed of two components; a long wavelength related to deeper mantle s
    1 KB (178 words) - 11:21, 1 November 2019
  • |Item=Geophone Tester SMT 100 Field Box LLR Field or shop unit that checked the integrity of a geophone or string of geophone
    294 bytes (42 words) - 11:21, 1 November 2019
  • |Item=Geophone Tester SMT 100 Field Box Field unit that checked the integrity of a geophone or string of geophones. Teste
    282 bytes (39 words) - 11:26, 1 November 2019
  • |Item=Magnetometer Portable Field
    408 bytes (59 words) - 11:28, 1 November 2019
  • |Item=Magnetometer Portable Field ...agnetic meridian and gravity horizon. To give accurate results, a magnetic field balance must have reliable means for leveling and orienting, a device for f
    2 KB (319 words) - 11:29, 1 November 2019
  • |Item=Magnetometer Portable Field
    1 KB (197 words) - 11:32, 1 November 2019
  • |Item=Magnetometer Portable Field
    413 bytes (59 words) - 11:39, 1 November 2019
  • |Item=Picture of SSC Field Crew
    414 bytes (68 words) - 11:41, 1 November 2019
  • |Item=Crude Oil, McFadden Field
    374 bytes (56 words) - 12:01, 23 July 2020
  • 308 bytes (9 words) - 09:08, 10 November 2019
  • 参见[[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    128 bytes (15 words) - 20:44, 28 December 2019
  • 142 bytes (2 words) - 01:02, 29 January 2020
  • |Item=Gravity Map (FreeAir Grav Anomaly Field) ...esent, and Jason 2 2008–present). Objective: The Free-Air Gravity Anomaly Field is composed of two components; a long wavelength related to deeper mantle s
    1 KB (175 words) - 12:12, 23 July 2020
  • 63 bytes (2 words) - 06:49, 5 November 2021

Page text matches

  • ...ationist, engineer, energy adviser, economist, and student involved in the field.
    4 KB (643 words) - 15:01, 30 June 2021
  • The absolute acceleration of the Earth&#x2019;s gravity field as opposed to relative gravity such as measured by conventional gravimeters
    712 bytes (99 words) - 12:43, 2 September 2016
  • Alternating-field demagnetization; see [[Special:MyLanguage/Dictionary:demagnetization|''dema
    237 bytes (21 words) - 11:32, 8 December 2017
  • ...the complex ratio of electric field <b>E</b> to the perpendicular magnetic field <b>H</b>, or the inverse of the impedance tensor ''Z''.
    731 bytes (113 words) - 15:01, 23 January 2018
  • Measurements of the Earth&#x2019;s gravity field in a moving airplane, blimp, or helicopter. Requires the precise measuremen
    747 bytes (99 words) - 15:03, 23 January 2018
  • ...nguage/Dictionary:Fig_A-5|A-5]]), reversals of the Earth&#x2019;s magnetic field (see Figure [[Special:MyLanguage/Dictionary:Fig_G-4|G-4]]), sequence strati
    650 bytes (89 words) - 22:51, 23 February 2018
  • Used to measure variations in the Earth&#x2019;s magnetic field from an aircraft. See [[Dictionary:magnetometer|''magnetometer'']].
    237 bytes (29 words) - 12:29, 17 October 2016
  • ...>), and to sampling such as is done in gravity surveys where the potential field is measured only at discrete stations, etc.
    4 KB (611 words) - 17:32, 26 February 2018
  • {{#category_index:A|alternating-field demagnetization}}
    217 bytes (19 words) - 20:50, 5 March 2018
  • A law giving the magnetic field caused by a current. See Figure [[Special:MyLanguage/Dictionary:Fig_A-10|A-
    271 bytes (40 words) - 10:25, 20 February 2020
  • '''2'''. The analytic signal <b>A</b> of a potential field <b>F</b> is If |''A''| is derived from a magnetic field, it peaks over contacts and its half-width at half maximum (measured perpen
    1 KB (201 words) - 14:39, 9 April 2018
  • A processing method for potential-field data, also called the <b>total gradient method</b>. Used for defining the l
    524 bytes (67 words) - 22:16, 9 April 2018
  • ...ted to a constant magnetic field while a supplemental decaying alternating field has been progressively reduced to zero. This procedure removes isothermal r
    416 bytes (55 words) - 11:03, 6 March 2018
  • ...physical properties; a perturbation from a normal, uniform, or predictable field. <b>2</b>. Observed minus theoretical value. <b>3</b>. A portion of a geoph
    1 KB (172 words) - 13:46, 17 October 2016
  • ...gnetic methods, quantities such as the moduli of the electric and magnetic field intensities (<b>E</b> and <b>H</b>) are measured at a certain frequency or
    3 KB (368 words) - 14:38, 11 March 2018
  • | ''IGSC 5 Chairman and Field Camp 2014 & 2015 Leader'' ...Geosciences Student Conference (it was an unique experience for Russia) or Field Camp 2014 (from the point of view of attracting attention from federal and
    7 KB (1,106 words) - 06:18, 21 January 2016
  • ...y</b> examples. (<b>a,b</b>) Dip-magnitude and dip-azimuth maps, Nun River field, Nigeria (from Bouvier et al., 1989).]]
    7 KB (961 words) - 15:01, 6 February 2018
  • Programs to automatically scan digital potential-field profiles or maps to estimate the depth of magnetic, gravity, etc. sources.
    832 bytes (98 words) - 02:53, 25 December 2017
  • ...mbol for induced [[Special:MyLanguage/Dictionary:magnetic_field|''magnetic field'']] (q.v.). <b>3</b>. The gradient in AVO studies, where the amplitude is o
    770 bytes (110 words) - 22:20, 4 October 2017
  • ...alue. <b>2</b>. Superposing an additional magnetic field upon the magnetic field associated with the signal during magnetic tape recording. Used to obtain a
    979 bytes (151 words) - 10:22, 24 March 2017
  • ...pairs of dipoles to determine the magnitude and direction of the electric field. The method is used for reconnaissance because of the low cost per station
    633 bytes (90 words) - 23:05, 24 March 2017
  • ...ed <b>simple Bouguer</b>. The Bouguer gravity field is not the same as the field that would have been observed at the datum elevation, because the shape of
    2 KB (280 words) - 11:42, 3 August 2017
  • ...solution and of the derivatives of the solution on the boundary. When the field values are specified the conditions are called ''Dirichlet conditions''. Wh
    910 bytes (127 words) - 22:21, 27 September 2020
  • ...t results when a charged particle experiences an acceleration while in the field of another charged particle. An electron accelerating as it approaches a nu
    639 bytes (91 words) - 18:42, 28 February 2017
  • ...) <b>1</b>. A resistivity calculated from orthogonal electric and magnetic field measurements, used for magnetotelluric measurements in a layered earth. For
    648 bytes (87 words) - 20:58, 27 February 2017
  • ...field component in some direction, ''E''<sub>''x''</sub>, to the magnetic field, ''H''<sub>''y''</sub>, in a perpendicular direction. For a horizontally la
    470 bytes (63 words) - 20:58, 27 February 2017
  • === Free Space with a potential field <math> U(x) </math> === <!--T:79-->
    12 KB (2,058 words) - 12:26, 26 October 2017
  • A constant used to compensate for inaccuracies in electromagnetic field parameters, current channeling, and static shifts. For transient electromag
    343 bytes (40 words) - 21:04, 27 February 2017
  • An electromagnetic technique in which the vertical magnetic field is measured as a function of frequency at the center of a large horizontal
    295 bytes (39 words) - 10:28, 11 July 2017
  • ...s and decay is measured for the first second of a three-seconds off time." Field measurements of chargeability are usually calibrated to the ''M''<sub>331</
    2 KB (276 words) - 15:02, 9 April 2019
  • ...stic wave equation. See Claerbout (1976, Fig. 10-1). <b>2</b>. A potential-field continuation method for converting level-flown data to drape-flown and vice
    532 bytes (73 words) - 10:37, 28 November 2017
  • (k&#x014D; ur&#x2019; siv) The magnetic field intensity required to reduce the magnetization of a sample to zero. General
    473 bytes (57 words) - 20:01, 26 January 2017
  • The demagnetizing field intensity required to reduce the induction of magnetic material from satura
    487 bytes (69 words) - 21:27, 26 January 2017
  • ...de-by-side display of traces that have the same source location; such as a field record; see Figure [[Special:MyLanguage/Dictionary:Fig_C-9|C-9]]d. <b>2</b>
    421 bytes (61 words) - 12:52, 8 May 2017
  • ...<math> f(z) </math> is a mapping from the field of complex numbers to the field of complex numbers, then <math> f(z) </math> must, itself be the sum of a p
    7 KB (1,124 words) - 00:09, 21 March 2020
  • ...here <math>\sigma </math> is the conductivity and <b>E</b> is the electric field. Conduction currents usually are more important than displacement currents
    1 KB (175 words) - 18:12, 16 July 2017
  • ...ld at the elevation ''z'', ''F''(''x'',''y'',''z''), can be found from the field on the surface, ''F''(''x'' ', ''y'' ',0). Where the surfaces are horizonta
    920 bytes (132 words) - 10:11, 20 August 2017
  • A sum obtained by adding the numbers in a field; used for checking to avoid dropout.
    207 bytes (29 words) - 19:39, 21 November 2017
  • ...f energy or mass by motion of the medium. A transport phenomenon where the field varies in time with the aid of motion of the medium. Examples include heat
    456 bytes (63 words) - 19:51, 21 November 2017
  • ...rough Gas Using 4-Component, 3D Seismic Data: A Case Study From The Lomond Field | journal = Offshore Technology Conference | location = Houston, TX | year
    4 KB (533 words) - 11:20, 19 September 2020
  • ...ismic wave generated by an earthquake, the frequency at which the spectral field begins to decrease. It is related to the dimensions of the source.
    430 bytes (67 words) - 12:07, 8 December 2017
  • Graphs of horizontal and vertical derivatives of the magnetic field intersect at critical points that have interpretation significance. Plots c
    326 bytes (42 words) - 10:17, 12 February 2018
  • ...ce loop that is horizontal. In the presence of a subsurface conductor, the field will be horizontal over the apex but will have vertical components in oppos
    589 bytes (90 words) - 10:17, 12 February 2018
  • Very rapid magnetic-field reversal.
    156 bytes (16 words) - 20:25, 15 February 2018
  • ...turn of spinning nuclei to their prior state after a superimposed magnetic field has been removed, as in [[Special:MyLanguage/Dictionary:nuclear-magnetic_re
    666 bytes (98 words) - 07:27, 14 February 2017
  • ...'' directions. <math>\nabla U </math> is the <b>gradient</b> of the scalar field U. As an operator on a vector field <b>V</b>, <math>\nabla \cdot \textbf{V} </math> is called the <b>divergence
    1 KB (179 words) - 19:45, 31 August 2018
  • ...he effect of the Earth&#x2019;s magnetic field. Also called <b>alternating-field demagnetization</b> and <b>degaussing</b>.
    893 bytes (138 words) - 14:30, 21 November 2018
  • .... <b>2</b>. The result of applying a wavelength filter to potential&#x0020;field&#x0020;data to emphasize anomalies around some depth.
    439 bytes (61 words) - 15:56, 22 March 2018
  • ...velocity function and then reanalyzed for velocity to update the velocity field.
    349 bytes (48 words) - 15:58, 22 March 2018
  • A map of one of the derivatives of a field of values such as gravity, magnetics, time structure, etc. The objective of
    1 KB (175 words) - 16:26, 30 January 2017
  • ...dic motion produces a magnetic moment opposite in direction to the applied field. Diamagnetic effects rarely exceed one nanotesla, the most evident diamagne
    873 bytes (117 words) - 18:26, 3 April 2017
  • ...y]]</b>, the ratio of the electrical displacement <b>D</b> to the electric field strength <b>E</b>, of the material to that of free space:
    1 KB (180 words) - 18:58, 13 May 2017
  • ...ctric material, no net electric charge need be transferred by the exciting field. By some definitions, induced polarization is a lossy type of dielectric po
    460 bytes (63 words) - 18:58, 13 May 2017
  • ...prism</b>. Vertical and dipping dike models are used commonly in potential-field calculations. <b>2</b>. Igneous rock that cuts across adjacent rock. Also s
    461 bytes (69 words) - 09:36, 3 August 2017
  • ...from eddy currents in a conducting body changes the direction of the total field (horizontal in the case of a vertical transmitter loop) which would be meas
    485 bytes (70 words) - 13:32, 11 October 2017
  • ...a <b>bipole. 3</b>. In electromagnetic surveying, an electric- or magnetic-field transmitting or receiving antenna which is small enough to be represented m
    804 bytes (121 words) - 14:07, 11 October 2017
  • {{#category_index:D|dipole field}} ...the [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']] (q.v.).
    245 bytes (33 words) - 14:09, 11 October 2017
  • <b>1</b>. A seismic field method wherein the primary concern is determining the dip of reflectors. Ma
    388 bytes (53 words) - 14:05, 11 October 2017
  • ...or <b>forward solution. 2</b>. Direct mathematical solution of a potential-field problem without use of precomputed curves or models.
    365 bytes (46 words) - 15:30, 27 November 2017
  • ...Phenomena with a periodicity of about one day. Changes in the geomagnetic field related principally to the rotation of the Earth in the [[Special:MyLanguag
    818 bytes (115 words) - 21:06, 3 April 2017
  • ...ature, absorption, and other reasons. <b>2</b>. The divergence of a vector field is expressed in Figure [[Special:MyLanguage/Dictionary:Fig_C-14|C-14]] for
    809 bytes (115 words) - 21:06, 3 April 2017
  • ...grand of the (hyper-)volume integral is an exact divergence of that vector field. The quantity <math> \mathbf{\hat{n}}=({\bar{n}}_1, {\bar{n}}_2, ... \bar{
    5 KB (847 words) - 17:07, 17 August 2021
  • ...or cab) that contains seismic or well-logging recording instruments in the field.
    208 bytes (26 words) - 20:47, 4 May 2017
  • A geophysicist engaged in field work. Originally used derisively to mean unscientific.
    208 bytes (24 words) - 22:47, 7 June 2017
  • ...outline the mass better until its depth is reached; beyond this point the field computed by continuation becomes erratic. Noise data often precludes succes
    991 bytes (141 words) - 16:30, 9 March 2017
  • <b>1</b>. Exa, the SI prefix for 10<sup>18</sup>. <b>2</b>. The electric field vector.
    185 bytes (26 words) - 10:05, 12 April 2019
  • {{#category_index:E|Earth&#x2019;s gravity field}} The field varies from about 978 000 mGal at the equator to 983 000 mGal at the poles.
    375 bytes (45 words) - 10:24, 16 March 2020
  • {{#category_index:E|Earth&#x2019;s magnetic field}} ...nd [[Special:MyLanguage/Dictionary:normal_magnetic_field|''normal magnetic field'']].
    284 bytes (37 words) - 10:24, 16 March 2020
  • ...e a secondary magnetic field that opposes the primary field. The secondary field has a quadrature component that depends on the ratio of the resistance to t
    674 bytes (98 words) - 15:30, 3 March 2017
  • {{#category_index:E|E-field ratio telluric method}}
    206 bytes (22 words) - 13:33, 6 February 2017
  • ...a high-frequency or large-wavenumber asymptotic representation of the wave field as a family of rays, represented by ray position and ray direction---the so
    2 KB (365 words) - 19:12, 8 April 2019
  • {{#category_index:E|electric field}} ...es or a time-varying magnetic field. Unit is volts per meter. The electric field <math> {\mathbf E}</math> induced in a loop equals the negative time deriva
    1 KB (163 words) - 11:37, 31 July 2018
  • The ratio of electric field to electric polarization, the electrical analog of magnetic permeability. S
    881 bytes (92 words) - 09:34, 9 April 2019
  • ...B; al&#x2019; i sis) Migration of charge through a membrane in an electric field.
    232 bytes (34 words) - 16:56, 2 January 2019
  • ...etotelluric_(MT)_method|''magnetotelluric method'']] (q.v.) where electric field measurements along a profile are made in a continuous fashion. Data is then
    597 bytes (76 words) - 17:07, 11 April 2019
  • ...duction effects are not important (resistivity and IP methods). <b>Natural field methods</b> (such as Afmag and magnetotellurics) employ natural energy as t
    1 KB (176 words) - 17:05, 29 July 2018
  • <b>1</b>. The phenomenon whereby an electric field moves a fluid through a membrane. <b>2</b>. Charge separation in an electro
    274 bytes (36 words) - 00:18, 27 August 2018
  • ...a material that causes it to change dimensions when subject to an electric field. See [[Special:MyLanguage/Dictionary:piezoelectric|''piezoelectric'']].
    332 bytes (42 words) - 14:32, 8 April 2019
  • ...ing the amplitudes and phases of two orthogonal components of the magnetic field.
    487 bytes (69 words) - 12:49, 8 April 2019
  • Seismic field arrangement wherein the source is at (or near) the end of the geophone spre
    302 bytes (41 words) - 17:02, 5 February 2017
  • ...ote VLF transmitter that measures the quadrature component of the electric-field wavetilt. Barringer tradename.
    268 bytes (33 words) - 13:50, 6 February 2017
  • Mapping the potential field produced by stationary (often remote) current electrodes. The mapping is do
    620 bytes (87 words) - 20:43, 6 February 2017
  • ...is everywhere perpendicular to lines of force. No work is done against the field when moving along such a surface. Mean sea level is an equipotential surfac
    422 bytes (58 words) - 20:43, 6 February 2017
  • ...ining gravity or magnetic sources that yields the same gravity or magnetic field as the actual distribution. See Dampney (1969).
    309 bytes (38 words) - 23:28, 21 August 2018
  • (oi&#x2019; l&#x2202;r) A procedure applied to profile or gridded potential field data to solve [[Dictionary:Euler&#x2019;s_homogeneity_equation|''Euler&#x20
    754 bytes (117 words) - 21:53, 19 February 2017
  • ...asure of the rate of field change with distance. For example, the magnetic field of a sphere falls off as the cube <math>(N=3)</math>, of a pipe as the squa
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  • {{#category_index:E|external magnetic field}}
    197 bytes (22 words) - 14:42, 7 February 2017
  • ...induced in a wire of length <math>l</math> (in meters) cutting a magnetic field of strength <math>B</math> (in gauss) at the velocity <math>v</math> (in m/
    748 bytes (129 words) - 10:30, 20 April 2021
  • {{#category_index:F|far-field}} ...3BB;=wavelength. Compare [[Special:MyLanguage/Dictionary:near-field|''near-field'']].
    572 bytes (77 words) - 08:15, 18 April 2017
  • A semi-infinite slab (plate) of uniform thickness, commonly used in potential-field modeling.
    215 bytes (25 words) - 11:43, 10 January 2019
  • [[Special:MyLanguage/Dictionary:field-effect_transistor_(FET)|<b>''F''</b>''ield''-<b>''E''</b>''ffect'' <b>''T''
    241 bytes (31 words) - 17:39, 29 October 2018
  • {{#category_index:F|field}} ...tract or area containing valuable minerals, such as a coal field or an oil field; see [[Special:MyLanguage/Dictionary:resource|''resource'']]. <b>4</b>. Spa
    795 bytes (115 words) - 17:18, 30 October 2018
  • {{#category_index:F|field balance}} See [[Special:MyLanguage/Dictionary:Schmidt_field_balance|''Schmidt field balance'']].
    209 bytes (23 words) - 17:18, 30 October 2018
  • {{#category_index:F|field continuation}}
    196 bytes (19 words) - 20:58, 29 July 2018
  • {{#category_index:F|field-effect transistor (FET)}} ...ion, and low cost. A semiconducting device that uses a transverse electric field as input to vary its conductance and thus control its output current. Ideal
    474 bytes (65 words) - 21:02, 29 July 2018
  • {{#category_index:F|field file}}
    206 bytes (25 words) - 17:18, 30 October 2018
  • {{#category_index:F|field filter}}
    181 bytes (23 words) - 13:12, 1 March 2017
  • {{#category_index:F|field impedance}}
    187 bytes (19 words) - 19:27, 12 August 2018
  • {{#category_index:F|field intensity}} ...lectric field, force per unit charge (or voltage gradient). Also called <b>field strength</b>. Sometimes expressed as <b>flux density</b>, lines of force pe
    464 bytes (70 words) - 19:20, 22 January 2018
  • {{#category_index:F|field of view}}
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  • {{#category_index:F|field processing}}
    478 bytes (67 words) - 13:13, 1 March 2017
  • {{#category_index:F|field tape}} A magnetic tape containing geophysical data recorded in the field, as opposed to a processed tape on which the data have been modified by com
    278 bytes (39 words) - 13:13, 1 March 2017
  • {{#category_index:F|field timing}} ...usually displayed on a field monitor record as timing lines), on an analog field tape as a 100-Hz timing signal, and on digital tape as timing words or word
    488 bytes (73 words) - 17:19, 30 October 2018
  • {{#category_index:F|fixed field}}
    151 bytes (17 words) - 18:33, 16 January 2018
  • ...<b>3</b>. A bit attached to a computer word to indicate the boundary of a field. <b>4</b>. An indicator to tell a later part of a computer program about a
    628 bytes (107 words) - 18:34, 16 January 2018
  • ...electrical, and other lines of force. The flux density is proportional to field intensity.
    234 bytes (30 words) - 20:04, 18 January 2018
  • See [[Special:MyLanguage/Dictionary:field_intensity|''field intensity'']].
    196 bytes (21 words) - 20:04, 18 January 2018
  • ...tation to minimize the magnetic field in two of these, thus maximizing the field for the third. Compare ''[[Special:MyLanguage/Dictionary:proton-precession_
    1 KB (143 words) - 20:05, 18 January 2018
  • ...ve measurements by dividing by the calculated free-space vertical magnetic field. Compare [[Special:MyLanguage/Dictionary:normal_correction|''normal correct
    865 bytes (121 words) - 12:22, 13 February 2017
  • {{#category_index:F|free field}} Not relating to a preassigned or fixed field.
    192 bytes (23 words) - 18:00, 14 November 2017
  • {{#category_index:F|free-space field}} ...by conductors. See [[Special:MyLanguage/Dictionary:primary_field|''primary field'']].
    260 bytes (32 words) - 17:59, 14 November 2017
  • A method of potential-field analysis in which parameters of interest are estimated from characteristics
    462 bytes (54 words) - 18:03, 14 November 2017
  • A device to measure small currents. A coil suspended in a constant magnetic field rotates through an angle proportional to the electrical current flowing thr
    325 bytes (44 words) - 18:50, 17 February 2017
  • '''1'''. A unit of magnetic field equal to one nanotesla, the preferred SI name. 1 gamma=10<sup>-5</sup> gaus
    738 bytes (108 words) - 10:37, 16 March 2020
  • The system for collecting the fluids from various wells within a field.
    197 bytes (25 words) - 03:59, 29 January 2018
  • ...s units, a magnetizing force (in oersteds) gives rise to a flux density or field (in gauss), with the values being equal in magnitude if in free space. Name
    758 bytes (119 words) - 04:00, 29 January 2018
  • Measurement positions with respect to the field of a dipole. Gauss-A is measurement along the dipole&#x2019;s axis, also ca
    323 bytes (47 words) - 04:01, 29 January 2018
  • ...its of measure. This can also be expressed in terms of the flux density or field strength <b>g</b>, the source density <math> \rho </math>, and the potentia
    2 KB (260 words) - 10:41, 16 March 2020
  • ...&#x2202; s&#x0113;) The study of the Earth&#x2019;s form and gravitational field. Involves the location of points on the Earth with respect to reference sys
    300 bytes (43 words) - 07:15, 29 January 2018
  • The gravity field (acceleration of gravity) at the latitude <math> \lambda </math> is given b
    701 bytes (92 words) - 22:13, 25 January 2018
  • {{#category_index:G|geomagnetic field}} See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    225 bytes (27 words) - 22:21, 25 January 2018
  • Reversals of the Earth&#x2019;s magnetic field that can be used to age-date formations. See Figure [[Special:MyLanguage/Di
    313 bytes (40 words) - 22:21, 25 January 2018
  • ...See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    350 bytes (48 words) - 22:22, 25 January 2018
  • Change in the polarity of the Earth&#x2019;s magnetic field from its present polarity. See [[Special:MyLanguage/Dictionary:magnetochron
    295 bytes (34 words) - 22:22, 25 January 2018
  • ...n the three components of the magnetic field at different stations, as the field varies naturally.
    363 bytes (44 words) - 22:21, 25 January 2018
  • A coil is suspended by springs in a magnetic field (the magnet may be integral with the case of the instrument). The relative movement of a magnetic field with respect to the coil generates a voltage across the coil, the voltage b
    2 KB (317 words) - 22:33, 25 January 2018
  • ...eshape changes, electric potential differences, magnetic and gravitational field strength, temperature, etc. Synonyms: <b>applied geophysics, geophysical pr
    534 bytes (62 words) - 12:01, 17 March 2017
  • ...>; (f) <b>gravity</b> and <b>geodesy</b> (the Earth&#x2019;s gravitational field and the size and form of the Earth); (g) <b>atmospheric electricity</b> and
    2 KB (230 words) - 07:27, 16 March 2017
  • {{#category_index:G|geothermal field}}
    281 bytes (34 words) - 11:24, 7 June 2018
  • ...scalar difference between the total and horizontal gradients of a magnetic field. It increases the lateral resolution and amplitude of thin-dike anomalies a
    356 bytes (47 words) - 06:16, 16 February 2017
  • ...ient in an arbitrary direction, as the horizontal gradient of the magnetic field. See also [[Special:MyLanguage/Dictionary:tensor_gradient|''tensor gradient
    1 KB (174 words) - 12:53, 1 February 2017
  • ...lar arrangement. The direction with respect to the Earth&#x2019;s magnetic field is a factor in interpretation. <b>2</b>. A three-arm torsion balance that i
    980 bytes (147 words) - 06:01, 17 February 2017
  • ...e force is a vector directed toward the attracting mass. The gravitational field ''g'' (also a vector, often called the <b>acceleration of gravity</b>) is t
    992 bytes (158 words) - 07:28, 17 February 2017
  • ...t mass from infinity to a given point against gravitational forces. In the field of a point mass ''m'' a distance ''r'' away, this is &#x03B3;''m''/''r'', w
    420 bytes (64 words) - 07:54, 17 February 2017
  • ...on between bodies because of their masses. Usually measured as the gravity field of the Earth that varies from about 978 000 mGal (9.78 m/s<sup>2</sup>) at
    526 bytes (66 words) - 07:47, 17 February 2017
  • ...as with a torsion balance), but usually the difference between the gravity field at two points is measured (as with a ''[[Special:MyLanguage/Dictionary:grav
    722 bytes (105 words) - 06:10, 22 February 2017
  • A method of emphasizing anomalies of a certain size in a potential-field map. A grid (usually square or triagonal) is drawn on a contour map and val
    931 bytes (137 words) - 14:25, 23 February 2017
  • A method of smoothing sharp irregularities in potential-field measurements that arise from very shallow sources. The average of values a
    392 bytes (56 words) - 14:22, 23 February 2017
  • ...)|''Henry'']] (q.v.), the SI unit of inductance. <b>2</b>. The magnetizing field vector. <b>3</b>. See [[Special:MyLanguage/Dictionary:H-type_section|''H-ty
    319 bytes (42 words) - 17:01, 28 November 2020
  • ...strip of metal when it carries a current when located in a strong magnetic field. Named for its discoverer, Edwin Herbert Hall (1855&#x2013;1938), American
    278 bytes (39 words) - 14:42, 18 August 2016
  • ...ing or halo of an opposite sign around an anomaly, reflecting the opposite field curvature around the periphery of the anomaly. Halos do not represent separ
    555 bytes (77 words) - 16:32, 22 July 2017
  • ...nd is used in calibration of magnetometers and nulling an ambient magnetic field for magnetic measurements. Named for Hermann Ludwig von Helmholtz (1821&#x2
    557 bytes (82 words) - 15:50, 23 July 2017
  • ...> is the wavespeed, and <math> \Psi (\boldsymbol{x},t) </math> is the wave field.
    2 KB (271 words) - 15:26, 5 January 2021
  • An alternative to vibroseis correlation for compressing vibrator field data. The vibrator&#x2019;s baseplate or reaction-mass&#x2019;s acceleratio
    745 bytes (94 words) - 14:11, 24 July 2017
  • ...ves to the neighboring atom. The apparent movement of holes in an electric field is equivalent to an electric current.
    483 bytes (76 words) - 13:38, 1 July 2016
  • A model used in calculating potential-field effects; a small-diameter horizontal cylinder so long that the ends of the
    471 bytes (71 words) - 14:03, 25 July 2017
  • ...separated by a constant distance are moved over a survey area. The primary field is nulled and then in-phase and quadrature components are measured. Also ca
    533 bytes (72 words) - 14:22, 25 July 2017
  • ...w members on such a program. <b>3</b>. Slang for an expert in a particular field.
    321 bytes (52 words) - 00:37, 21 December 2016
  • ...ed young geophysicist who has made several impressive contributions to the field of seismic imaging and yet is very modest about his own accomplishments. ...virtual sources in the subsurface, without the need of having actual wave field recordings in a borehole. Again he is showing his highly innovative researc
    6 KB (831 words) - 15:09, 25 September 2015
  • ...agnetism that is retained is called '''remanent magnetism'''. The magnetic field intensity required to reduce the remanent magnetization to zero is the '''c
    869 bytes (131 words) - 16:23, 5 May 2016
  • ...l horizontal direction), the <b>wave impedance</b> (<b>Cagniard impedance, field impedance</b>, or <b>surface impedance</b>) ''Z''<sub>''S''</sub> is:
    2 KB (326 words) - 15:44, 7 March 2017
  • A constant which, when multiplied by certain measurements made on potential-field anomalies, gives an estimate as to the depth of the anomalous mass (usually
    361 bytes (53 words) - 15:20, 20 December 2011
  • ...a magnetizable body becomes magnetized by merely placing it in a magnetic field. ...ss by which a body becomes electrified by merely placing it in an electric field.
    968 bytes (157 words) - 23:28, 18 January 2017
  • ...current (also called <b>ground loop</b>) produces an alternating magnetic field that causes a current in a receiving coil; the current is nearly proportion
    2 KB (246 words) - 21:33, 4 January 2020
  • ...lied only to electromagnetic methods for which the receiver is in the near-field (or induction zone) of the transmitter.
    377 bytes (53 words) - 16:26, 8 April 2019
  • Normalized measurements of the electric field using an inductive (ungrounded loop) source carrying a time-varying current
    401 bytes (48 words) - 14:44, 10 April 2019
  • A (usually) fixed, remote electrode that is very far from roving field surveying electrodes. Ideally, the infinite electrode is located far enough
    371 bytes (48 words) - 07:05, 30 July 2018
  • ...points are at the same locations (including elevations) as those of actual field stations.
    288 bytes (39 words) - 23:21, 18 January 2017
  • ...ic field'']] and [[Special:MyLanguage/Dictionary:magnetic_field|''magnetic field'']].
    1 KB (154 words) - 23:24, 10 February 2017
  • {{#category_index:I|International Geomagnetic Reference Field (IGRF)}} ...armonics. The IGRF is subtracted from observed data to determine the local field.
    436 bytes (55 words) - 20:37, 27 February 2017
  • <b>1</b>. The magnitude of a potential field U surrounding a unit element varies inversely as the square of the distance ...10<sup>&#x2013;7</sup>&#x0020;webers/amperemeter; and to an electrostatic field where the element ''m'' is an electrical charge of ''m'' coulombs and ''k''
    1 KB (211 words) - 20:29, 7 February 2017
  • (in vur&#x2019; zh&#x2202;n or in vur&#x2019; sh&#x2202;n) Deriving from field data a model to describe the subsurface that is consistent with the data; d
    1 KB (178 words) - 21:37, 7 February 2017
  • ...ns in an electric field, measured by the ratio of ion velocity to electric-field strength.
    234 bytes (32 words) - 14:43, 8 February 2017
  • ...A}</math> is conservative and can be expressed as the gradient of a scalar field <math>\phi</math>, <math>\mathbf{A} = \nabla{\phi}</math>.
    414 bytes (62 words) - 16:58, 14 February 2017
  • Maps (charts) showing the elements of the geomagnetic field.
    186 bytes (22 words) - 19:06, 24 February 2017
  • ...d magnetization (product of susceptibility and the Earth&#x2019;s magnetic field strength). A large <b>Q</b> indicates that the magnetic material will tend
    473 bytes (67 words) - 19:58, 30 March 2017
  • (la plas&#x2019;) A differential equation that describes field behavior in free space. The <b>Laplacian</b> <math>{\nabla}^2 U</math> of a
    1 KB (138 words) - 19:25, 1 July 2020
  • ...arth&#x2019;s field). Radio-frequency energy at right angles to the steady field will be absorbed because of resonance when the RF-frequency equals the prec
    1,007 bytes (126 words) - 15:40, 7 September 2017
  • ...orth-south correction to magnetic data to remove the Earth&#x2019;s normal field.
    1 KB (160 words) - 21:18, 7 October 2017
  • ...gives the direction of an induced emf in a conductor that cuts a magnetic field. See Figure [[Special:MyLanguage/Dictionary:Fig_I-3|I-3]].
    275 bytes (39 words) - 20:30, 15 November 2017
  • ...&#x2202;z) An induced emf is in such a direction as to generate a magnetic field that opposes the change which induced it. Named for Heinrich Friedrich Emil
    302 bytes (46 words) - 10:56, 16 March 2020
  • ...ational fields, etc. See [[Special:MyLanguage/Dictionary:field_intensity|''field intensity'']].
    614 bytes (95 words) - 18:30, 26 August 2017
  • ...taken to be equiphase along the wire. In the near-field zone the magnetic field varies inversely with distance for a line source, inversely with distance s
    934 bytes (151 words) - 18:32, 26 August 2017
  • <b>1</b>. Field observations which begin and end at the same point with a number of interve
    794 bytes (119 words) - 13:53, 17 April 2019
  • ..., (d) the direction of the observations with respect to the Earth&#x2019;s field.
    630 bytes (98 words) - 11:17, 13 July 2017
  • ...l_Geomagnetic_Reference_Field_(IGRF)|''International Geomagnetic Reference Field (IGRF)'']] (q.v.), (g) inclination and declination, and (h) cultural effect
    625 bytes (81 words) - 12:25, 30 July 2017
  • <b>1</b>. The current loop that is the elementary source of a magnetic field. The current may be free or bound (as in electron orbitals in magnetized ma
    738 bytes (107 words) - 12:48, 30 July 2017
  • See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    226 bytes (28 words) - 13:27, 30 July 2017
  • ...orizontal. Generally not coincident with the Earth&#x2019;s equator. Local field irregularities are often ignored. Also called the <b>aclinic line</b>.
    425 bytes (63 words) - 13:52, 30 July 2017
  • {{#category_index:M|magnetic field}} ...w surrounds an electric current. <b>H</b> is sometimes called the magnetic field. See Figure [[Special:MyLanguage/Dictionary:Fig_M-1|M-1]].
    3 KB (465 words) - 19:31, 30 July 2017
  • {{#category_index:M|magnetic field of the Earth}} ...[[Special:MyLanguage/Dictionary:Fig_M-2|M-2]]. See also ''normal magnetic field''.
    850 bytes (140 words) - 18:44, 1 August 2017
  • ...over measuring the field itself: (a) it reduces noise because of temporal field changes, (b) enhances shallow anomalies, and (c) improves lateral resolutio
    457 bytes (56 words) - 16:17, 15 August 2017
  • ...d by galvanic currents. Involves measuring the normalized primary magnetic field <math>H_{N},</math> where <math>H_{P}</math> is the steady-state magnetic field amplitude measured at a single transmitter frequency, <math>H_{P}'</math> i
    1 KB (192 words) - 16:17, 15 August 2017
  • See [[Special:MyLanguage/Dictionary:magnetic_field|''magnetic field'']].
    200 bytes (21 words) - 16:17, 15 August 2017
  • ...ld strength; see [[Special:MyLanguage/Dictionary:magnetic_field|''magnetic field'']].
    252 bytes (25 words) - 16:17, 15 August 2017
  • ...rating until a satisfactory degree of fit between model field and observed field is achieved. Sedimentary anomalies are also interpreted, especially with hi
    2 KB (240 words) - 16:18, 15 August 2017
  • The direction of the horizontal component of the Earth&#x2019;s magnetic field; the direction of magnetic north.
    239 bytes (31 words) - 16:18, 15 August 2017
  • ...agnetic induction <math display="inline">\mathbf{B}</math> to the inducing field strength <math display="inline">\mathbf{H}</math>; denoted by the symbol <m
    918 bytes (134 words) - 17:24, 10 April 2019
  • ...See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']]. <b>2</b>. The pole strength of a magnetized bar of cross-
    926 bytes (143 words) - 16:48, 15 August 2017
  • ...magnetic pole to the point. A <b>magnetic vector potential</b> is a vector field whose curl gives the magnetic induction.
    663 bytes (102 words) - 16:48, 15 August 2017
  • ...an (124 to 83 Ma) during which no reversals of the Earth&#x2019;s magnetic field occurred, so that ocean-basin magnetic stripes are absent.
    352 bytes (46 words) - 16:48, 15 August 2017
  • The anomaly produced by a body is the same if the induced field and magnetization directions are interchanged.
    267 bytes (33 words) - 16:48, 15 August 2017
  • ...nts (electron spin and/or nuclear spin) of atoms with an external magnetic field. Magnetic resonance is basic to the operation of the ''[[Special:MyLanguage
    717 bytes (82 words) - 16:48, 15 August 2017
  • A period of rapid, irregular, transient fluctuations of the magnetic field that are greater in magnitude, more irregular, and of higher frequency than
    695 bytes (96 words) - 18:03, 1 August 2017
  • ...tructure, or of determining depth to basement. Differences from the normal field are attributed to the distribution of materials having different susceptibi
    505 bytes (69 words) - 11:11, 2 August 2017
  • ...val of remanence (if its direction is known), change from total field to a field component or vice-versa, etc.
    430 bytes (62 words) - 23:34, 2 March 2017
  • ...b>M</b> or <b>I</b>. A measure of the effect of the medium on the magnetic field <b>B</b> when subject to a magnetizing force <b>H</b>:
    1 KB (174 words) - 22:26, 3 March 2017
  • ...own as magnetic field strength. See [[Dictionary:magnetic_field|''magnetic field'']] and Figure [[Dictionary:Fig_M-1|M-1]].
    303 bytes (42 words) - 22:44, 3 March 2017
  • Changes in the polarity of the Earth&#x2019;s magnetic field from its present polarity have occurred a number of times in the Earth&#x20
    398 bytes (57 words) - 22:49, 3 March 2017
  • ...ucting fluid (such as a liquid metal or an ionized gas) through a magnetic field. Also called <b>hydromagnetics</b>.
    360 bytes (56 words) - 23:29, 7 March 2017
  • ...lf-exciting dynamo and is responsible for the Earth&#x2019;s main magnetic field.
    304 bytes (42 words) - 22:57, 3 March 2017
  • ...re the total-field intensity and cesium magnetometers measure the absolute field and achieve 0.001 nT accuracy. Vector and vertical-component airborne magne
    888 bytes (102 words) - 23:33, 7 March 2017
  • ...itude and ''H''<sub>''po''</sub>=predicted uniform ground primary magnetic field. Involved in measurements of [[Dictionary:magnetic_induced_polarization_(MI ...conductivity distribution is surveyed by measuring the secondary magnetic field arising from current flow. The magnetic measurement direction is perpendicu
    1,018 bytes (143 words) - 22:20, 8 March 2017
  • The space pervaded by the Earth&#x2019;s magnetic field, usually extending to more than 10 Earth radii on the sunlit side and to 40
    345 bytes (48 words) - 22:56, 8 March 2017
  • The use of reversals of the Earth&#x2019;s magnetic field to determine stratigraphic age, or the use of the orientation of remanent m
    499 bytes (67 words) - 23:09, 8 March 2017
  • A 2D convolution often applied to potential-field maps, whereby each point on the map grid is replaced by a weighted sum of t ...tical-derivative maps may be made. Other weighting schemes can be used for field continuation, wavelength filtering, etc. See [[Special:MyLanguage/Dictionar
    1 KB (203 words) - 22:06, 20 March 2017
  • ...cies according to mass/charge ratio by separating their ions in a magnetic field.
    274 bytes (36 words) - 17:09, 13 February 2017
  • ...eld intensity, <b>H</b> is the magnetizing force, <b>B</b> is the magnetic field strength, <b>D</b> is the electric displacement, <b>J</b> is the current de
    2 KB (293 words) - 09:42, 31 August 2020
  • ...between induced-current dipole moment per unit volume (''P'') and electric field (''E''):
    2 KB (302 words) - 13:12, 6 March 2017
  • A field-effect transistor or integrated circuit characterized by extremely high inp
    238 bytes (26 words) - 13:12, 6 March 2017
  • ...ns between plasma emitted from the Sun (solar wind) and the Earth&#x2019;s field. Micropulsations also result from lightning strikes. Micropulsations are cl
    854 bytes (113 words) - 14:38, 29 November 2018
  • ...smic)'']]. <b>2</b>. Movement of ions in a solution because of an electric-field gradient; called <b>mobility</b>. <b>3</b>. Movement of hydrocarbons betwee
    1 KB (130 words) - 21:22, 30 March 2017
  • <b>1.</b>&#x0020;The velocity of charge carriers per unit electric field. Usually refers to movement of ions in a solution. Also called <b>migration
    316 bytes (44 words) - 12:38, 10 April 2019
  • {{#category_index:N|near-field}} ...depths'']] (q.v.). Compare [[Special:MyLanguage/Dictionary:far-field|''far field'']]. See Sheriff and Geldart (1995, 48).
    857 bytes (119 words) - 04:25, 1 August 2017
  • ...y, ''n'' may be determined by a gradiometer arrangement or calculated from field measurements.
    301 bytes (41 words) - 20:31, 30 June 2020
  • {{#category_index:N|nondipole field}} See [[Special:MyLanguage/Dictionary:magnetic_field_of_the_Earth|''magnetic field of the Earth'']].
    223 bytes (27 words) - 18:39, 18 March 2018
  • <b>1</b>. Subtracting the normal magnetic field from magnetic data. <b>2</b>. Normalizing the ratio of successive Turam rea
    378 bytes (52 words) - 17:07, 14 January 2018
  • {{#category_index:N|normal magnetic field}} ...roughly aligned with the present-day field. Antonym: <b>reversed magnetic field</b>.
    797 bytes (110 words) - 15:22, 11 December 2017
  • ...tion does not occur instantaneously but grows with time. When the exciting field is removed, the spins gradually return to their original state. The rate of
    1 KB (166 words) - 21:51, 22 October 2017
  • ...ct on the measurements. Hydrogen nuclei are aligned with a static magnetic field and then disturbed by a radio-frequency pulse that involves transverse magn
    2 KB (321 words) - 20:46, 22 October 2017
  • ...esonance; the resonance frequency is proportional to the absolute magnetic-field strength. See also [[Special:MyLanguage/Dictionary:proton-precession_magnet
    472 bytes (47 words) - 22:29, 6 November 2017
  • ...rge of the recording on a seismic crew. Sometimes the observer is also the field manager and sometimes principally an electronic technician. <b>2</b>. The o
    347 bytes (51 words) - 21:06, 27 October 2017
  • ...nit of magnetic-field intensity (in the cgs-emu system) in free space; the field that would exert a force of 1 dyne on a unit magnetic pole. Equal to 1 ampe
    459 bytes (66 words) - 13:07, 8 April 2019
  • ...supplying current. <b>2</b>. The time during which the charging current or field from a pulse-type transmitter is observed at the receiver.
    336 bytes (47 words) - 11:24, 21 April 2019
  • ...y sensitive (&#x2248;0.001 nT). They measure absolutely the total magnetic field.
    502 bytes (66 words) - 12:36, 10 November 2017
  • ...Resonance of paramagnetic free electrons results from excitation by a VHF field.
    476 bytes (67 words) - 12:41, 14 November 2017
  • ...r materials to determine the intensity and direction of the Earth&#x2019;s field at the time the materials were magnetized. It has as adjuncts <b>archeomagn
    581 bytes (81 words) - 15:12, 4 November 2017
  • {{#category_index:P|parallel field}} A uniform field in which current flow lines or equipotential surfaces are parallel.
    207 bytes (26 words) - 17:06, 8 November 2017
  • ...y. Paramagnetism usually contributes only a few nanoteslas to the magnetic field at the Earth&#x2019;s surface. Compare [[Special:MyLanguage/Dictionary:diam
    589 bytes (71 words) - 18:00, 8 November 2017
  • ...y is varied. Observations can be made at different times after the primary field is extinguished. Used to resolve resistivity layering assuming that the lay
    595 bytes (80 words) - 19:02, 8 November 2017
  • The group working together to carry out a geophysical field project. Also called <b>crew</b> or <b>troop</b>.
    224 bytes (32 words) - 13:43, 11 November 2017
  • ...party chief (or supervisor, if no party chief), who is responsible for the field work.
    238 bytes (33 words) - 13:51, 11 November 2017
  • <b>1</b>. The ratio of the magnetic field <b>B</b> to the magnetizing force <b>H.
    1 KB (204 words) - 15:22, 7 March 2018
  • See [[Special:MyLanguage/Dictionary:magnetic_field|''magnetic field'']].
    208 bytes (23 words) - 15:49, 7 March 2018
  • Permission from a landowner for a geophysical field party to work on his land.
    194 bytes (26 words) - 16:13, 7 March 2018
  • A measurement made on profiles across potential-field (especially magnetic) anomalies, with the objective of determining the dept
    733 bytes (104 words) - 11:38, 20 April 2021
  • ...ed by surface conditions rather than the production ability of the well or field.
    303 bytes (43 words) - 15:59, 4 March 2019
  • Rocks become magnetized according to the direction of the Earth&#x2019;s field at the time of their formation. As the Earth&#x2019;s plates drift with tim
    791 bytes (116 words) - 16:24, 14 February 2019
  • ...ity can be determined by specified mathematical operations, as a potential field from which seismic displacement, velocity, etc. can be ascertained by diffe
    735 bytes (107 words) - 13:38, 9 April 2019
  • {{#category_index:P|potential field}} ...ch as gravity, magnetic, or electrical fields. For such fields, the vector field may be expressed as the gradient of some scalar potential or the curl of a
    416 bytes (59 words) - 12:54, 8 May 2019
  • {{#category_index:P|potential-field tilt}}
    198 bytes (21 words) - 14:47, 10 April 2019
  • ...magnetic or gravity potential function might give the magnetic or gravity field, or the divergence and curl of a seismic potential function might give the
    592 bytes (85 words) - 16:49, 12 August 2018
  • ...ector is the cross-product of the electric field strength and the magnetic field strength.
    334 bytes (47 words) - 13:13, 29 March 2019
  • ...em&#x2019; fa sis) <b>1</b>. Frequency filtering before processing (as in field recording) so as to emphasize certain frequencies compared to others. <b>2<
    378 bytes (50 words) - 10:57, 7 April 2019
  • ...e reservoir pressure has dropped appreciably, often early in the life of a field, to reduce pressure decline and increase ultimate oil recovery.
    341 bytes (47 words) - 16:52, 24 April 2019
  • {{#category_index:P|primary field}} The electromagnetic field that would be generated if the source were in free space.
    206 bytes (27 words) - 19:58, 11 July 2018
  • The ratio of electromagnetic field readings at two locations in the absence of conducting material. Also calle
    317 bytes (41 words) - 16:33, 8 April 2019
  • ...rface; <b>mapping</b>. Specifically, a resistivity, IP, or electromagnetic field method wherein a fixed electrode or antenna array is moved progressively al
    692 bytes (91 words) - 07:47, 13 July 2018
  • ...because of its spin. The nuclei precess about the Earth&#x2019;s magnetic field ''H'' at a frequency ''f''<sub>''L''</sub> (<b>Larmor frequency</b>), ...00 Hz. As the protons gradually relax into random orientation, the induced-field strength drops to zero. The rate of drop depends on interatomic forces and
    1 KB (181 words) - 21:20, 27 January 2018
  • The gravity field calculated from magnetic-field measurements by means of [[Special:MyLanguage/Dictionary:Poisson&#x2019;s_r
    506 bytes (61 words) - 17:17, 1 March 2018

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