Boulder Geomagnetic Observatory (BOU) is a geomagnetic observation facility operated by the United States Geological Survey (USGS). It is located near Boulder, Colorado at 40°08′15″N 105°14′16″W. The site was established in 1961.
Customers of the observatory include the Space Weather Prediction Center (SWPC) and the Air Force Weather Agency (AFWA).
References
Boulder Geomagnetic Observatory Wikipedia(Text) CC BY-SA