U.S. Digital Data

U.S. Digital Data

After pioneering the first airborne magnetic survey in 1944, the U.S. Geological Survey (USGS) has collected piecemeal aeromagnetic data for most of the U.S., including offshore areas on both coasts. The U.S. Geological Survey's digital and analog archives comprise more than 1,000 surveys, covering approximately 8,000,000 line-km of data, flown at various flight heights and line spacings.

The following open-file reports contain the United States aeromagnetic data sets. The duplication of the surveys included in the two reports is minimal.

Digital Data

The data available here are the currently available digitally standardized magnetic databases, metadata reports, and images of survey coverage and quality for individual aeromagnetic surveys. For state gridded compilations, go to the state listing.

Digital Aeromagnetic Datasets for the Conterminous United States and Hawaii - A Companion to the North American Magnetic Anomaly Map, U.S. Geological Survey Open-File Report 02-361
Please note that this site will be upgraded periodically to enhance the ease of accessibility.

Alaska Digital Aeromagnetic Database Description, U.S. Geological Survey Open-File Report 99-0503.

Digitized Analog Data

The data available here are digitally converted analog magnetic field intensity maps. These maps are either USGS or publicly accessible publications. They were generated as needed to fulfill USGS project requirements

Digitized Aeromagnetic Datasets for the Conterminous United States, Hawaii, and Puerto Rico, U.S. Geological Survey Open-File Report 99-0557