Solar Cycle 23 - Top 50 solar flares

On this page you will find an overview of the strongest solar flares from Solar Cycle 23 together with links to more information in our archive and a video (if available) of the event. This page is updated daily.

RegionStartMaximumEnd
1X28+2003/11/04048619:2919:5320:06
2X20+2001/04/02939321:3221:5122:03
3X17.2+2003/10/28048609:5111:1011:24
4X17+2005/09/07080817:1717:4018:03
5X14.42001/04/15941513:1913:5013:55
6X102003/10/29048620:3720:4921:01
7X9.41997/11/06810011:4911:5512:01
8X92006/12/05093010:1810:3510:45
9X8.32003/11/02048617:0317:2517:39
10X7.12005/01/20072006:3607:0107:26
11X6.52006/12/06093018:2918:4719:00
12X6.22005/09/09080819:1320:0420:36
13X6.22001/12/13973314:2014:3014:35
14X5.72000/07/14907710:0310:2410:43
15X5.62001/04/06941519:1019:2119:31
16X5.42005/09/08080820:5221:0621:17
17X5.42003/10/23048608:1908:3508:49
18X5.32001/08/25959116:2316:4517:04
19X4.91998/08/18830722:1022:1922:28
20X4.82002/07/23003900:1800:3500:47
21X42000/11/26923616:3416:4816:56
22X3.92003/11/03048809:4309:5510:19
23X3.91998/08/19830721:3521:4521:50
24X3.82005/01/17072006:5909:5210:07
25X3.71998/11/22838406:3006:4206:49
26X3.62005/09/09080809:4209:5910:08
27X3.62004/07/16064913:4913:5514:01
28X3.62003/05/28036500:1700:2700:39
29X3.42006/12/13093002:1402:4002:57
30X3.42001/12/28976720:0220:4521:32
31X3.32002/07/20003921:0421:3021:54
32X3.31998/11/28839504:5405:5206:13
33X3.12002/08/24006900:4901:1201:31
34X32002/07/15003019:5920:0820:14
35X2.82001/12/11973307:5808:0808:14
36X2.81998/08/18830708:1408:2408:32
37X2.72003/11/03048801:0901:3001:45
38X2.71998/05/06821007:5808:0908:20
39X2.62005/01/15072022:2523:0223:31
40X2.62001/09/24963209:3210:3811:09
41X2.61997/11/27811312:5913:1713:20
42X2.52004/11/10069601:5902:1302:20
43X2.51998/11/22838416:1016:2316:32
44X2.32001/04/10941505:0605:2605:42
45X2.32000/11/24923614:5115:1315:21
46X2.32000/06/06902614:5815:2515:40
47X2.21998/11/23838406:2806:4406:58
48X2.12005/09/10080821:3022:1122:43
49X2.12002/05/20996115:2115:2715:31
50X2.11997/11/04810005:5205:5806:02

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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 2020:123
Current stretch spotless days:31

This day in history*

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*since 1994

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