Geomagnetic Observatories
Detailed Description
Geomagnetic observatories in Fredericksburg, Virginia. This site is one of the world’s most important observatories because it has produced high-quality data for years. Credit: USGS
Geomagnetic observatories in Fredericksburg, Virginia. This site is one of the world’s most important observatories because it has produced high-quality data for years. Credit: USGS