| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2021/05/18 | 3 | 120 | CAO | N19E64 | |
| 2021/05/19 | 3 | 130 | HSX | N19E51 | |
| 2021/05/20 | 3 | 150 | HSX | N19E38 | |
| 2021/05/21 | 3 | 150 | HSX | N20E27 | |
| 2021/05/22 | 9 | 190 | CSI | N22E11 | |
| 2021/05/23 | 9 | 190 | CSI | N18W00 | |
| 2021/05/24 | 8 | 180 | CSI | N19W14 | |
| 2021/05/25 | 8 | 120 | CSO | N20W27 | |
| 2021/05/26 | 5 | 250 | CSO | N20W41 | |
| 2021/05/27 | 5 | 250 | DHO | N20W55 | |
| 2021/05/28 | 4 | 250 | DHO | N18W67 | |
| 2021/05/29 | 4 | 120 | CAO | N18W78 | |
| 2021/05/30 | 2 | 80 | CSO | N18W92 |
| B | C | M |
|---|---|---|
| 88 | 21 | 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.4 | 2021/05/22 | 21:30 | 21:36 | 21:43 | |
| 2 | M1.2 | 2021/05/23 | 11:00 | 11:08 | 11:14 | |
| 3 | M1.1 | 2021/05/22 | 17:03 | 17:11 | 17:16 | |
| 4 | C9.5 | 2021/05/28 | 22:19 | 23:13 | 00:12 | |
| 5 | C7.6 | 2021/05/27 | 22:54 | 23:15 | 23:24 | |
| 6 | C6.9 | 2021/05/22 | 23:05 | 23:13 | 23:17 | |
| 7 | C6.2 | 2021/05/22 | 02:47 | 02:56 | 03:00 | |
| 8 | C6.0 | 2021/05/22 | 06:05 | 06:17 | 06:24 | |
| 9 | C4.8 | 2021/05/21 | 19:15 | 19:28 | 19:32 | |
| 10 | C3.2 | 2021/05/22 | 15:10 | 15:35 | 15:44 |
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |