Viewing archive of Saturday, 25 September 1999

GFZ Potsdam official Kp-index

00-03h 03-06h 06-09h 09-12h 12-15h 15-18h 18-21h 21-00h Ap
1+1-0+1111-1- 4

NOAA estimated Kp-index

00-03h 03-06h 06-09h 09-12h 12-15h 15-18h 18-21h 21-00h
10112221

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/06/08Kp5 (G1)
Number of spotless days in 2019:103
Current stretch spotless days:30

This day in history*

Solar flares
12003M6.8
21999M3.6
32000M3.5
41999C5.3
52015C5.3
ApG
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3201714
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*since 1994

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