Viewing archive of Tuesday, 21 December 1999

Sunspot numberNew regionsBackground fluxCM
129 -200C1.171

Solar flares

Region Start Maximum End
8806 C3.2 01:03 01:09 01:18
8807 C1.3 02:36 02:55 03:00
- C1.4 03:02 03:14 03:31
8806 C1.5 08:22 08:30 08:37
8798 C2.0 10:31 10:35 10:38
8806 M1.1 17:12 17:19 17:22
- C2.6 21:41 21:46 21:49
8803 C3.4 23:30 23:38 23:46

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2018/10/13Kp5 (G1)
Number of spotless days in 2018:169
Current stretch spotless days:5

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