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|USGS Geomagnetism Program
The U.S. Geological Survey Geomagnetism Program monitors the Earth's magnetic field at 14 ground-based observatories in the United States. The Program provides continuous records of magnetic field variations from Fluxgate and Proton magnetometers.
|Digital Object Identifier (DOI)
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FDSN Web Services provide a common data access API for seismic data.
|Definitive Data is available through INTERMAGNET at http://intermagnet.org/data-donnee/download-eng.php and ftp://ftp.seismo.nrcan.gc.ca/