Severe Geomagnetic Storm Alert 2024 Today. A stunning aurora, caused by a severe geomagnetic storm, is painting the sky shades of pink, purple and green as it spreads into locations it rarely reaches friday. A g4 geomagnetic storm was observed at 0257 utc tuesday.

Tuesday, september 17, 2024 23:59 utc. On thursday, may 9, 2024, the noaa space weather prediction center issued a severe (g4) geomagnetic storm watch.