Top 25 sunspot regions of 2021
On this page you will find an overview of the largest sunspot regions of the year 2021. This page is updated daily. Sunspot information comes from the NOAA SWPC.
| Region | Size | Number of sunspots | Class Magn. | Class Spot | ||
|---|---|---|---|---|---|---|
| 1 | 2021/07/01 | 2835 | 770 | 20 | EKC | |
| 2 | 2021/12/30 | 2916 | 640 | 14 | ESI | |
| 3 | 2021/09/08 | 2866 | 500 | 15 | DKC | |
| 4 | 2021/10/24 | 2887 | 440 | 14 | DKI | |
| 5 | 2021/09/29 | 2880 | 390 | 18 | DKC | |
| 6 | 2021/10/29 | 2891 | 350 | 16 | DKI | |
| 7 | 2021/08/28 | 2860 | 340 | 27 | EKI | |
| 8 | 2021/09/21 | 2871 | 310 | 8 | DKO | |
| 9 | 2021/12/18 | 2907 | 310 | 24 | DKI | |
| 10 | 2021/12/30 | 2921 | 300 | 2 | DSO | |
| 11 | 2021/12/15 | 2908 | 300 | 6 | DKO | |
| 12 | 2021/09/08 | 2868 | 300 | 17 | DHI | |
| 13 | 2021/12/25 | 2918 | 280 | 17 | DKI | |
| 14 | 2021/05/27 | 2826 | 280 | 9 | DKO | |
| 15 | 2021/10/09 | 2882 | 280 | 4 | DHO | |
| 16 | 2021/05/26 | 2824 | 250 | 5 | CSO | |
| 17 | 2021/11/29 | 2900 | 240 | 11 | DAO | |
| 18 | 2021/10/13 | 2884 | 230 | 2 | AXX | |
| 19 | 2021/09/07 | 2864 | 220 | 10 | CSO | |
| 20 | 2021/12/17 | 2909 | 210 | 6 | DSO | |
| 21 | 2021/03/18 | 2810 | 200 | 2 | HAX | |
| 22 | 2021/09/30 | 2877 | 200 | 13 | DAO | |
| 23 | 2021/02/25 | 2804 | 190 | 10 | DSI | |
| 24 | 2021/05/11 | 2822 | 190 | 9 | DAO | |
| 25 | 2021/10/19 | 2886 | 185 | 1 | HSX |
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 85.2 +7 |
| Last 30 days | 85.2 +8.6 |
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