M3.9 solar flare, S1 radiation storm

Saturday, 2 April 2022 18:09 UTC

M3.9 solar flare, S1 radiation storm

M-class flaring continues today from sunspot region 2975 with an M2.9 solar flare this night and a spectacular long duration M3.9 solar flare at 13:55 UTC. While writing this news article, we see yet another M-class flare from this region peaking at M4.3 but this solar flare looks much more impulsive and might not release a CME, but it is still way too early to tell.

We are going to focus on the M3.9 solar flare because that was today's headline grabbing event. Sunspot region 2975 is now near the west limb but thanks to the Parker spiral, the powerful eruption did cause a minor S1 solar radiation storm here at Earth which causes minor issues with HF radio propagation at polar latitudes.

The coronal mass ejection that was launched during the M3 event is impressive. We did not expect this due to the region's location near the limb but the coronal mass ejection is very wide, almost to the point of it being an asymmetrical full halo coronal mass ejection as seen on SOHO LASCO. We will await further information from the NOAA SWPC and their ENLIL solar wind model but a glancing blow should not be ruled out in a few days.

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