Solar Flare History

Last updated: Dec 29, 2025 11:20:31 AM EST • Cache: OK • Results: 44

This list comes from the GOES X-ray flare feed (currently best as “last 7 days”). Filter to keep it readable.

Class	Begin (ET)	Peak (ET)	End (ET)	Plain-English
C3.0	Dec 29, 2025 8:10 AM EST	Dec 29, 2025 8:14 AM EST	Dec 29, 2025 8:18 AM EST	Small. Minor HF radio effects possible.
C2.7	Dec 29, 2025 7:10 AM EST	Dec 29, 2025 7:19 AM EST	Dec 29, 2025 7:24 AM EST	Small. Minor HF radio effects possible.
C3.8	Dec 29, 2025 4:43 AM EST	Dec 29, 2025 4:47 AM EST	Dec 29, 2025 4:52 AM EST	Small. Minor HF radio effects possible.
C4.3	Dec 29, 2025 3:07 AM EST	Dec 29, 2025 3:17 AM EST	Dec 29, 2025 3:28 AM EST	Small. Minor HF radio effects possible.
C2.6	Dec 29, 2025 2:57 AM EST	Dec 29, 2025 3:03 AM EST	Dec 29, 2025 3:07 AM EST	Small. Minor HF radio effects possible.
C2.6	Dec 29, 2025 2:23 AM EST	Dec 29, 2025 2:31 AM EST	Dec 29, 2025 2:36 AM EST	Small. Minor HF radio effects possible.
M1.0	Dec 29, 2025 1:34 AM EST	Dec 29, 2025 1:51 AM EST	Dec 29, 2025 1:56 AM EST	Medium. Radio blackouts possible on the sunlit side.
C8.9	Dec 28, 2025 9:58 PM EST	Dec 28, 2025 10:05 PM EST	Dec 28, 2025 10:10 PM EST	Small. Minor HF radio effects possible.
C4.8	Dec 28, 2025 8:19 PM EST	Dec 28, 2025 8:28 PM EST	Dec 28, 2025 8:32 PM EST	Small. Minor HF radio effects possible.
M2.2	Dec 28, 2025 6:57 PM EST	Dec 28, 2025 7:02 PM EST	Dec 28, 2025 7:07 PM EST	Medium. Radio blackouts possible on the sunlit side.
M4.2	Dec 28, 2025 5:01 PM EST	Dec 28, 2025 5:39 PM EST	Dec 28, 2025 5:54 PM EST	Medium. Radio blackouts possible on the sunlit side.
C6.8	Dec 28, 2025 4:48 PM EST	Dec 28, 2025 4:53 PM EST	Dec 28, 2025 4:56 PM EST	Small. Minor HF radio effects possible.
M1.3	Dec 28, 2025 4:03 PM EST	Dec 28, 2025 4:13 PM EST	Dec 28, 2025 4:23 PM EST	Medium. Radio blackouts possible on the sunlit side.
C2.9	Dec 28, 2025 10:02 AM EST	Dec 28, 2025 10:09 AM EST	Dec 28, 2025 10:16 AM EST	Small. Minor HF radio effects possible.