Boulder Geomagnetic Observatory (BOU) is a geomagnetic observation facility operated by the United States Geological Survey (USGS). It is located near Boulder, Colorado at . The site was established in 1961.
Customers of the observatory include the Space Weather Prediction Center (SWPC) and the Air Force Weather Agency (AFWA).
Instruments A magnetometer A solar proton sensor
See also Space weather Heliophysics K-index
External links Boulder (BOU) Geomagnetic Observatory website Boulder USGS Magnetometer Monitor