Geomagnetism
Geomagnetism
We monitor the Earth's magnetic field. Using ground-based observatories, we provide continuous records of magnetic field variations; disseminate magnetic data to various governmental, academic, and private institutions; and conduct research into the nature of geomagnetic variations for purposes of scientific understanding and hazard mitigation. Explore and search below.
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Magnetic Disturbance Event Summaries
Select an event to view a summary.
Keeping the Lights On in North America
Realtime geoelectric maps during a magnetic storm can assist utility companies with their operations and can help power-grid managers to make decisions that may minimize the impact to their systems.
The Electric Storm of November 1882
Strange things started happening on November 17, 1882, and no one knew quite what to make of it.
New Magnetic Observatory at Ewa
The text below was reproduced from the Coast and Geodetic Survey, Department of Commerce publication, September, 1959.