Dictionary:A:Index
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- A(annum)
- Alpha
- A-type collision
- A-type section
- A.U.
- A+B,A*B
- A
- AAPG-A
- AB electrodes
- Ab plane
- AB rectangular array
- Abandon
- ABC method
- Abelian
- Abnormal end
- Abnormal pressure
- Abort
- Absolute gravity
- Absorbing boundary
- Absorptance
- Absorption band
- Absorption coefficient
- Absorption
- Ac coupling
- Ac demagnetization
- Ac-bias recording
- Ac
- Acceleration factor
- Acceleration of gravity
- Accelerometer
- Acceptance criteria
- Acceptor
- Access time
- Accommodation space
- Accumulate error
- Accuracy
- Acidic crust
- Acidizing a well
- Aclinic line
- Acoustic basement
- Acoustic coupler
- Acoustic emissions
- Acoustic impedance section
- Acoustic impedance
- Acoustic log
- Acoustic medium
- Acoustic network
- Acoustic positioning
- Acoustic transparency
- Acoustic velocity log
- Acoustic wave equation
- Acoustic wave
- Acoustic-impedance log
- Acoustic
- Acoustilog
- Acquisition footprint or imprint
- ACTI
- Activation logging
- Activation overvoltage
- Active beacon
- Active fault
- Active layer
- Active margin
- Active microwave
- Active
- Activity
- Ada
- Adachi formulas
- Adams-Williamson equation
- Adaptive processing
- Adder
- Additive primary colors
- Address
- Adiabat
- Adiabatic
- Adit
- Adjacent-bed effect
- Adjoint
- Adjugate
- Admittance (electrical)
- Admittance (seismic)
- Adsorption potential
- Adsorption
- Advection
- AEM
- Aeolian
- Aeolotropy
- Aerated zone
- Aerogravity
- Aeromagnetic gradiometer
- Aeromagnetic survey equipment
- Aeromagnetic survey specification
- Aeromagnetic
- Afferent
- Affine
- Afmag method
- Aftershock
- AGC time constant
- Age dating
- Age
- Aggradation
- AI
- Air blast
- Air drill
- Air gun
- Air pressure
- Air shooting
- Airborne gravity
- Airborne magnetometer
- Aircraft signature
- Airwave
- Airy hypothesis
- Airy phase
- Airy-Heiskanen isostasy
- AIX
- Albedo
- Alert
- Alford rotation
- Algebraic reconstruction technique (ART)
- ALGOL
- Algorithm
- Alias dips
- Alias filter
- Alias
- Alidade
- Alkali-vapor magnetometer
- Alkalyne flooding
- Allocate
- Allochthonous
- Alluvial
- Almanac
- Alpha (α)
- Alpha centers
- Alpha configuration
- Alpha cup
- Alpha radiation, α particles
- Alpha∥(α∥)
- Alphameric
- Alphanumeric
- Alpine collision
- Alternating-field demagnetization
- Alternator
- Altitude
- ALU
- AM
- Amalgamated
- Ambient
- Ambiguity
- Ammeter
- Ammonium nitrate
- Amorphous
- Ampere (A)
- Ampere’s law
- Ampferer collision
- Amplifier
- Amplitude anomaly
- Amplitude distortion
- Amplitude equalization
- Amplitude extraction
- Amplitude log
- Amplitude map
- Amplitude modulation (AM)
- Amplitude of the envelope
- Amplitude recovery
- Amplitude shadow
- Amplitude spectrum
- Amplitude, instantaneous
- Amplitude
- AMT
- Anaglyph
- Analog computer
- Analog modeling
- Analog tape formats
- Analog-digital converter
- Analog
- Analytic Function
- Analytic signal method
- Analytic signal
- Anaseism
- Anastomosing
- Anchor
- AND gate
- Anelasticity
- Anellipticity
- Angle of approach
- Angle of incidence
- Angles (surveying)
- Angles right
- Angular distance
- Angular frequency
- Angular reflection coefficient
- Angular unconformity
- Anhysteretic remanent magnetization
- Animation
- Anion
- Anisotropy (electrical)
- Anisotropy (geostatistical)
- Anisotropy (seismic)
- Anisotropy paradox
- Anisotropy parameters
- Anisotropy, weak
- Anisotropy
- Annealing methods
- Annotation
- Annulus
- Anode
- Anomaly
- Anoxic
- ANSI
- Antenna
- Antialias filter
- Anticausal
- Anticipation function
- Anticline
- Anticoincidence circuit
- Antiferromagnetism
- Antiparallel
- Antiroots
- Antisymmetric
- Antithetic fault
- AP
- Aperture
- Apex
- API gravity
- API unit
- API well number
- API
- APL
- Aplanatic surface
- Apodizing function
- Apogee
- Apparent autocorrelation function
- Apparent density
- Apparent dip
- Apparent polarity
- Apparent resistivity
- Apparent truncation
- Apparent velocity
- Apparent wavelength
- Apparent wavenumber
- Apparent-resistivity curve
- Apparent-velocity filtering
- Apparent
- Appatite fission tracks
- Application program
- Applications package
- Applied geophysics
- Applied-potential method
- Appraisal well
- APRE
- Aquapulse
- Aquaseis
- Aquiclude
- Aquifer support
- Aquitard
- Arbitrary line
- Arc cosine (arc sine, arc tangent)
- Arc shooting
- Archaeological survey
- Archeomagnetism
- Archie’s formulas
- Architecture
- Archive
- Areal closure
- Areal survey
- Arg (x)
- Argand diagram
- Argo
- Argument
- Aries
- ARIS
- Arithmetic average, arithmetic mean
- Arithmetic logic unit
- Arm
- ARMA filter, ARMA deconvolution
- Aromatic
- Arpent
- Array (computer)
- Array (electrical)
- Array (electromagnetic)
- Array (seismic)
- Array factor
- Array induction log
- Array laterolog
- Array length
- Array processor
- Array Seismic Imager
- Array station
- Arrival time
- Arrival
- Arrow plot
- ART
- Artifact
- Artificial illumination
- Artificial intelligence
- Artificial lift
- Artificial magnetic anomalies
- Artificial neural net
- Artificial reality
- Ascension
- ASCII
- Asdic
- Aseismic
- Aspect ratio
- Asperities
- Asphaltene
- Assembler language
- Assembler
- Associative memory
- Astatic
- Asthenosphere
- Astronomic latitude
- Asymptote
- Asymptotic wave theory
- Asynchronous protocol
- Asynchronous system
- Asynchronous
- Athy equation
- Atmospheric electricity
- Atmospheric window
- Atomic absorption spectrophotometry
- Atomic capture cross-section
- Atomic clock
- Attack time
- Attenuation factor
- Attenuation
- Attenuator
- Atterberg limits
- Attitude
- Attribute, seismic
- Attribute
- Audio-frequency magnetic method
- Audio-magnetotelluric method (AMT)
- Audio
- Auger
- Aulacogen
- Authigenic
- Autoconvolution
- Autocorrelation pulse
- Autocorrelation
- Autocorrelogram
- Autocovariance
- Automated depth estimation
- Automatic gain control (AGC)
- Automatic picking
- Autoregressive deconvolution
- Autoregressive series
- Autotracker
- Autotracking
- AUV
- Auxiliary plane
- Auxiliary storage
- AVA (AVO) inversion
- AVA
- AVC
- Average amplitude
- Average predicted residual error (APRE)
- Average velocity
- Average
- Avulsion
- Axial surface
- Axial-dipole array
- Azimuth angle
- Azimuth bar
- Azimuth map
- Azimuth spider
- Azimuth
- Azimuthal anisotropy
- Azimuthal array
- Azimuthal asymmetry
- Azimuthal projection
- Azimuthal survey
- Azimuthal VES
- Azimuthal VSP
- Α∥