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A strong solar flare measuring M8.7 erupted from Active Region 3435 at 12:54 UTC on September 21, 2023. The event started at 12:42 and ended at 13:02 UTC. This is the second M8 solar flare since M8.2 at 14:11 UTC on September 20. As of the time of press, there were no radio signatures detected that would suggest a coronal mass ejection (CME) was produced. Radio frequencies were forecast to be most degraded over eastern South America, Atlantic Ocean, western Europe, and most of Africa at the time of the flare. Region 3435 (beta-delta) still has enough energy to produce strong to major eruptions and it’s rotating toward the center of the disk — Earth-directed CMEs are possible in the days ahead. Read more: You can follow space weather in near real-time using our redesigned SWX application at Alerts, Watches and Warnings published by the SWPC as well as C solar
