science π Massive solar storm hits Earth, shrinking magnetosphere
The Gannon geomagnetic storm, the strongest in over two decades, caused dramatic auroras across Mexico, Japan, and Australia in May 2024. This event impacted the plasmasphere surrounding Earth, which was observed to contract significantly by Japan's Arase satellite. The Kp index peaked at 9, marking the first G5 event in over 20 years since October 2003. Scientists are studying these detailed changes to understand geomagnetic disturbance risks better. The depleted plasma reservoir took several days to start refilling after the intense solar activity subsided. π°οΈ