USGS Magnetic Anomaly Data Grid for the Continental US
Magnetic anomalies reflect variations in the distribution and type of magnetic minerals, primarily magnetite, in the Earth’s crust. This google overlay illustrates the magnetic anomalies across the continental US.
International Geomagnetic Reference Field Model
The International Geomagnetic Reference Field Model from NOAA Includes: Magnetic Declination (D), Inclination (I), Horizontal intensity (H), Vertical intensity (Z), and Total Intensity (F)
Magnetic Anomaly Map of the Earth
Magnetic Anomaly Map of the Earth Global compilation of the wealth of magnetic anomaly information. The magnetic field at or near the surface of the Earth is a combination of Earth's magnetic field and fields of external (solar) origin.
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