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Solar activity
Auroral activity
Earth-directed CME, M6 solar flare

Yesterday's X2.8 solar flare (which is the strongest solar flare since 2017) came from sunspot region 3514 which is rotating towards the west limb. It became clear quite soon following the event that it would be eruptive but is there a chance that the resulting coronal mass ejection (CME) arrives at Earth? Keep on reading for the answer!

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Space weather facts

Last X-flare2025/12/01X1.9
Last M-flare2025/12/04M6.0
Last geomagnetic storm2025/12/04Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2025114.6 -15.2
December 2025186 +71.4
Last 30 days106.3 +12.6

This day in history*

Solar flares
12006X12.9
22006M2.63
32024M2.5
42014M2.22
52023M1.5
DstG
11958-176G3
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*since 1994

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