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Solar activity
Auroral activity
X1.9 solar flare, Coronal hole faces Earth

Welcome to December! New month, new solar activity! Sunspot region 4274 took center stage at the beginning of November with numerous X-class events and some gorgeous coronal mass ejections, some of which arrived at Earth and caused severe G4 geomagnetic storm conditions. However she is not done yet. This sunspot region survived its trip around the far side of the Sun and she is flaring again at the start of December but with a new number: 4299. This morning ex-4274 announced her return with an X1.9 (R3-strong) solar flare that peaked at 02:49 UTC!

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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
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32024M2.5
42014M2.22
52023M1.5
DstG
11958-176G3
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*since 1994

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