For the third day in a row, sunspot 1261 has unleashed a significant M-class solar flare. The latest blast at 0357 UT on August 4th registered M9.3 on the Richter Scale of Flares, almost crossing the threshold into X-territory (X-flares are the most powerful kind).
Earth’s magnetic field is likely to receive a double-strike from the clouds of gas on August 4th at 22:39 UT plus minus 7 hours, though it could extent to August 6th.
Mild to moderate geomagnetic storms are possible when the CMEs arrive. High-latitude sky watchers should be alert for auroras.
Filed under: The Sun
