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NCEI (formerly NGDC)

Airborne Magnetic Data

NGDC's aeromagnetic program focuses on global data to support modeling of Earth's magnetic field. The U.S. aeromagnetic data are now updated and available from the USGS Geophysical Products web. NGDC continues to archive and serve data for main field modeling. These data are described below.

All marine and airborne trackline surveys can be accessed via our mapviewer.

Aeromagnetic trackline data:

Some Special Collections:

U.S. Magnetic/Gravity data sources

The USGS has taken over the archive and distribution of the US airborne data. They have been working for several years to clean up, document, and post data on-line free of charge. Please contact the USGS Pat Hill ( 303 236-1343) for access to the desired surveys or visit the following USGS websites: