Encyclopedic Dictionary of Applied Geophysics, fourth edition

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Encyclopedic Dictionary of Applied Geophysics
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Series Investigations in Geophysics, No. 13
Title Encyclopedic Dictionary of Applied Geophysics
Author Robert Sheriff
DOI http://dx.doi.org/10.1190/1.9781560802969
ISBN ISBN 978-1-56080-118-4
Store SEG Online Store

The fourth edition of SEG's bestseller is now available in its entirety on the wiki - for free. This is a valuable, comprehensive reference that is a must for every geophysicist, geologist, explorationist, engineer, energy adviser, economist, and student involved in the field.


Translation projects

In February 2017, a group of volunteers started translating Robert Sheriff's Encyclopedic Dictionary into Spanish. As of 16 May 2019, the entire book has been completed!

Thank you to our Team Leaders and volunteers for this major accomplishment!

To read the Spanish translation, visit any Dictionary article or click on any letter above - for example visit mud log - and look at the top of the article for "español" in the gray bar.

Since the initial language project, teams of volunteers have started translating the Dictionary into Mandarin, Arabic, and Russian. If you would like to be involved in any of the translation projects, contact us wiki‐at‐seg.org.

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Volunteer with the SEG Wiki

The fourth edition of SEG's bestseller Encyclopedic Dictionary was last updated in 2002. It's a valuable reference that now needs to be updated for the next generation of scientists. Along with the SEG Wiki Committee, help the Society and the science of applied geophysics with this ambitious project to crowd source the fifth edition of the Dictionary and honor the legacy and scholarship of Robert Sheriff.

The SEG Wiki committee and SEG staff seek volunteers with geophysical knowledge to update Robert Sheriff's Encyclopedic Dictionary on the SEG Wiki. These volunteers will write articles based on the content list built by the SEG Wiki Committee. These volunteers will ensure that content is clear, concise, and accurate. Additionally, new entries will model the encyclopedic model (of the SEG Wiki and Wikipedia) over the dictionary style.

Learn more and sign up today!

Common editing tasks

Since Robert Sheriff conceptualized a written book when completing his work, there are two common issues that detract from the full online experience. These issues arise in:

  1. references
  2. figures


Just like technical papers, wikis need citations and references if they are to be useful and trusted. Frequently, references will appear in the articles without proper citations. This is the full list of references that appear in the Dictionary. Use this page to locate the missing full citations in the Dictionary articles.

The Q article has been fixed. Note: References can be difficult to find since there is not a category listing all of the pages that need references. Many of the articles, including Dictionary figures, will need to have references added.


As with references, most of the figures do not appear in their entirely on the article. All of the figures for Sheriff’s Dictionary have captions. We will retain the captions when adding the figures to the Dictionary entries.

It is possible that these figures will have the same issues as the dictionary entries: improper math and no references. I encourage you to address these issues in the figures as you see them.

The Q article shows one way to integrate them. Some articles have lots of figures. Note: Figures can be difficult to find since there is not a category listing all of the pages that need figures included.