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Feel the attraction of gravity!

Geophysical Fields: Links

GEOS 602
Spring 2010
Tu-Th 1:30-3:00, GI Auditorium

Instructor: Jeff Freymueller

x7286 Elvey 413B jeff.freymueller@gi.alaska.edu

Last Updated: March 28, 2010


The Cox and Chao (2002) paper in Science shows the time evolution of J2. J2 has been getting smaller over time (the earth less oblate, or less bulging in the middle). But starting in 1998 there was a big deviation from that trend. If the link above does not work, try this one.

General information about the gravity field and geodesy is http://earth-info.nima.mil/GandG/wgsegm/

Global Gravity Models

The EGM96 model was developed jointly by NASA and NIMA.

The EIGEN-5C model was developed by GFZ-Potsdam, and combines GRACE and LAGEOS mission data plus 0.5 x 0.5 degrees gravimetry and altimetry surface data. Older GFZ EIGEN models are also available.

Alaska Gravity Data

The USGS has published online (and on CD-ROM) the compilation of Alaska gravity data, along with some other useful stuff. It is USGS Data Series 264.


The latest IGRF model, IGRF-11, is available from the NGDC.

Inverse Theory

Heat Flow

Dr. Jeffrey T. Freymueller
Professor of Geophysics
Geophysical Institute
University of Alaska, Fairbanks
Fairbanks, AK 99775-7320

Phone 907-474-7286
Fax 907-474-5618
Office 413B Elvey