Viewing archive of Friday, 17 September 1999

Solar flares

RegionStartMaximumEnd
8690M2.1 01:1401:2001:23
8700C2.1 05:0505:1205:42
-C1.4 10:2710:3010:33
-C4.5 11:4712:0612:20
8700C1.7 13:5313:5714:02
-C1.4 14:3314:3714:44
8692C3.1 17:5918:0418:09
8699C1.5 19:5019:5319:57
-C8.8 22:0622:1222:17

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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 2019:237
Current stretch spotless days:10

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*since 1994

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