Viewing archive of Saturday, 21 September 2013

Sunspot numberNew regionsBackground fluxMaximum fluxC
79 -60B2.7C1.06572

Solar flares

RegionStartMaximumEnd
1850C1.0 01:3901:4501:52
1850B8.3 02:0102:0402:06
-B8.9 07:2807:3507:41
-C3.0 08:3809:2409:32

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/08/05Kp5 (G1)
Number of spotless days in 2019:163
Current stretch spotless days:18

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