Skip to main content
Purdue University Purdue Logo Purdue Libraries

Geology: Geophysics

The scientific study of the origin, history, and structure of the earth.

gravity measurements

Estimated Value of Magnetic Declination.  - total magnetic intensity of the terrestrial field.   To compute the magnetic declination, you must enter the location and date of interest.  NOAA - National Geophysical Data Center.

Compute magnetic field values - (NOAA - National Geophysical Data Center) On-line calculators to estimate current and past values of the magnetic field.

Compute Historic Declination - (NOAA - National Geophysical Data Center)


Subject Guide

Thomas Gerrish's picture
Thomas Gerrish
3053R WALC
(765) 496-9620