Geomagnetic Storm 2025 August. Tuesday, august 13, 2025 14:00 utc g4 (severe) geomagnetic storming was observed at approximately 1442 utc on 12 aug in response to a coronal. Updated 13 oct 2025 spotless days current stretch:

During a solar geomagnetic storm flare, an intense burst of radiation from the sun changes the composition and speed of the particles within the earth’s atmosphere. The geomagnetic storms were triggered by solar particles expelled by the sun during a series of explosive coronal mass ejections that accompanied no less than.