M2.7 solar flare with earth-directed CME!

Sunday, 31 August 2025 16:54 UTC

An asymmetrical full halo coronal mass ejection left the Sun yesterday (30 August) during an M2.7 solar flare from sunspot region 4199 which at the time was located at a perfect earth-facing position. There is no doubt that this cloud of plasma has an earth-directed component as we can see a very clear halo outline on the LASCO C2 animated coronagraph images which you can find blow. We expect an arrival time tomorrow (1 September) around 20:00 UTC (plus/minus 6 hours). Geomagnetic storm conditions are likely as the NOAA SWPC has issued a moderate G2 geomagnetic storm watch (Kp6) for tomorrow (1 September) and surprisingly even a strong G3 geomagnetic storm watch (Kp7) for the following day (2 September) when CME effects are expected to peak.