Viewing archive of Saturday, 18 September 1999

Sunspot numberNew regionsBackground fluxMaximum fluxC
152 81 -1B9.5C2.975

Solar flares

RegionStartMaximumEnd
-C1.7 08:5709:0209:09
8699C1.9 09:1309:1909:21
8700C2.4 14:1414:2114:33
-C2.9 15:1416:0516:09
8699C2.3 18:1818:2118:23

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2019:247
Current stretch spotless days:20

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*since 1994

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