Solar Cycle 23 - Top 25 sunspot regions
On this page you will find an overview of the largest sunspot regions from Solar Cycle 23. This page is updated daily. Sunspot information comes from the NOAA SWPC.
| Region | Size | Number of sunspots | Class Magn. | Class Spot | ||
|---|---|---|---|---|---|---|
| 1 | 2003/10/30 | 0486 | 2610 | 108 | FKC | |
| 2 | 2001/03/30 | 9393 | 2440 | 51 | FKI | |
| 3 | 2000/09/20 | 9169 | 2140 | 28 | FKC | |
| 4 | 2004/07/22 | 0652 | 2010 | 67 | FKC | |
| 5 | 2002/08/20 | 0069 | 1990 | 60 | EKC | |
| 6 | 2003/10/23 | 0484 | 1750 | 56 | EKC | |
| 7 | 2003/10/31 | 0488 | 1750 | 34 | FKC | |
| 8 | 2005/01/17 | 0720 | 1630 | 37 | EKC | |
| 9 | 2002/09/11 | 0105 | 1520 | 40 | FKI | |
| 10 | 1998/09/04 | 8323 | 1460 | 33 | FKC | |
| 11 | 2005/09/10 | 0808 | 1430 | 38 | FKC | |
| 12 | 2001/11/11 | 9690 | 1420 | 74 | FKC | |
| 13 | 1999/08/03 | 8651 | 1370 | 43 | FKI | |
| 14 | 2004/08/14 | 0656 | 1360 | 99 | FKC | |
| 15 | 2002/07/17 | 0030 | 1350 | 71 | FKC | |
| 16 | 1999/11/19 | 8765 | 1280 | 35 | EKC | |
| 17 | 2000/05/16 | 8996 | 1280 | 45 | EKC | |
| 18 | 2003/06/12 | 0375 | 1250 | 41 | FKC | |
| 19 | 1999/10/18 | 8731 | 1220 | 54 | FKC | |
| 20 | 2000/04/24 | 8970 | 1210 | 31 | EKC | |
| 21 | 2001/11/01 | 9682 | 1210 | 61 | EKC | |
| 22 | 2002/10/24 | 0162 | 1120 | 41 | FKI | |
| 23 | 2001/09/11 | 9608 | 1110 | 52 | FKC | |
| 24 | 2000/03/03 | 8882 | 1100 | 24 | EKC | |
| 25 | 1999/12/24 | 8806 | 1100 | 28 | FHC |
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/10 | M5.7 |
| Last geomagnetic storm | 2026/05/05 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 103.1 +23.8 |
| Last 30 days | 95.2 +0.9 |
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