Solar Cycle 24 - Top 50 geomagnetic storms

On this page you will find an overview of the strongest geomagnetic storms from Solar Cycle 24 together with links to more information in our archive. The Kp-values on this page are the official, finalized Kp-values from the GFZ in Potsdam, Germany. The Ap-index provides a daily average level for geomagnetic activity. The Ap-index is thus a storm-index where long geomagnetic storms have a higher daily Ap-value. This page is updated daily. Times are in UTC.

Ap 00-03h03-06h06-09h09-12h12-15h15-18h18-21h21-00hKp max
12015/03/1710825-6-5+8-8-7+8-8-View archive
22017/09/0810685-4+58+7+6+5-8+View archive
32012/03/09875-6+87+7-6-32+8View archive
42012/07/15784+5+7-65+6767View archive
52015/10/07744-66-556+7+67+View archive
62015/06/237278-6+5+6-3-4-3+8-View archive
72013/03/177222+7-6+6-6+7-67-View archive
82016/05/08706-6+65-5+6-6-6+6+View archive
92015/12/2070466-4+5+6+7-6+7-View archive
102018/08/266757-7+5-5-6537+View archive
112015/09/11603476+6-7-34-7View archive
122015/09/095946-665+5-6-5+6View archive
132013/10/02585+8-6-4-33+6-5-8-View archive
142013/06/01586-76+56-3+4-37View archive
152016/10/25574+4+3+56+6+5+66+View archive
162015/06/225713+4+35-5+8+5+8+View archive
172010/04/055533+5+8-6-54+4-8-View archive
182015/08/27525-6+6-445-46+6+View archive
192017/09/28515+6+7-5-4-44-5-7-View archive
202013/06/29506-6+6-5+5-44+4-6+View archive
212017/05/28496+7654-2-11-7View archive
222010/08/04496+4+3-554-6+5-6+View archive
232012/03/07484-5-66-5+5+5-46View archive
242017/04/224756-5555-4-5+6-View archive
252015/03/184765-4+4+5+5+5-5-6View archive
262012/10/13473+56-5+6-6-4+4-6-View archive
272017/03/27462+55-6-4+5+6+46+View archive
282016/10/13462+34+5-5-6+6+56+View archive
292015/05/13465-66-5-44+54+6View archive
302012/10/09467-66-4+2-2357-View archive
312019/09/01455-55+55+4+5-5-5+View archive
322015/10/08455-6-6-4+55-5-4+6-View archive
332011/05/28455-3-6+66+21+46+View archive
342017/11/08446-6+3+4+54+3+5-6+View archive
352017/07/1644215-5+6-5+65-6View archive
362016/10/26445-54-6-46-5-5-6-View archive
372015/09/204435-75+4+53-37View archive
382015/09/07442+34-3-5-6+6-6+6+View archive
392010/04/064455+5-5-4+5+5-5-5+View archive
402018/04/20433+466-4+55+3+6View archive
412014/02/19434+66+56-2+22+6+View archive
422012/06/17434-3+5+6644+46View archive
432015/04/16425-5-5-4+4-45+66View archive
442012/07/16426+5+5-4+55-3-36+View archive
452012/07/09425-4-4+4-7-5+3+4+7-View archive
462011/08/0542320+0+0+37-8-8-View archive
472012/04/24417-6-5-23-3-4+57-View archive
482015/08/28405+5-3355+6-46-View archive
492012/10/0840346+6-42+5+46+View archive
502011/09/10406-5-4-5-3-5-4+6-6-View archive

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Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2020/05/29M1.1
Last geomagnetic storm:2020/04/20Kp5 (G1)
Number of spotless days in 2020:122
Current stretch spotless days:30

This day in history*

Solar flares
12002M1.6
22002M1.3
31999C8.7
42003C8.6
52011C7.0
ApG
1200590G4
2200359G3
3199451G2
4199539G2
5200022
*since 1994

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