Among others, geomagnetic data is used to characterize the impact of space weather events on earth. The dominent source of space weather are processes on the sun. A live image of the sun (EIT 304 from SOHO, ESA/NASA) is shown above.
This potassium sensor of the supergradiometer, manufactured by GEM, measures the absolute value of the geomagnetic field and is the most sensitive geomagnetic instrument at the Observatory. For interpretation, the gradients of several sensors are analyzed.magnetism