Japan’s Arase Finds a Surprising Radiation Source

概要

New research announced on October 27, 2026 reveals an unexpected radiation source near Earth. Using Japan’s Arase satellite, researchers studied the powerful May 2024 geomagnetic storm. Electrons reached around 3 MeV in a region where such energetic particles are normally rare. A growing local peak in their distribution supports local acceleration, and natural electromagnetic chorus waves likely helped supply the energy. These particles can damage satellite electronics. Understanding where the...