Advertisement

This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

quiettime

quiettime

During periods when there are no geomagnetic storms impacting the area around Earth, high-energy protons (with energy of hundreds of thousands of electronvolts, or keV; shown here in orange) carry a substantial electrical current that encircles the planet (also known as “the ring current”).
Credit: Johns Hopkins APL