Viewing archive of Thursday, 17 August 2017

Sunspot numberNew regionsBackground fluxMaximum flux
300A8.3B6.88

Solar flares

RegionStartMaximumEnd
2671B1.9 23:5900:0300:08
2671B2.0 00:3100:3500:41
2671B2.5 00:5701:0201:05
2671B6.8 02:3002:3602:39
2671B1.6 06:1606:1906:21
2671B2.9 11:2711:4011:46
-B1.3 14:3514:3914:41
-B1.2 16:1316:1616:18

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/09/28Kp5 (G1)
Number of spotless days in 2019:217
Current stretch spotless days:19

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*since 1994

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