Magnetic_Field_Earth.png - Wikipedia

Summary

Description Magnetic Field Earth.png	English: Lithospheric Magnetic Anomalies. A modeled image of Earth's magnetic field variations created as a result of science satellites like Magsat . nT = nanoteslas. The color bar indicates areas with positive and negative magnetic fields.
Date	May 17, 2004 - (date of web publication)
Source	http://www.nasa.gov/centers/goddard/news/topstory/2004/0517magnet.html
Author	Credit: Terrence Sabaka et al./NASA GSFC

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