| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2005/08/25 | 11 | 30 | DAO | N12E78 | |
| 2005/08/26 | 10 | 200 | DAI | N12E67 | |
| 2005/08/27 | 15 | 110 | DAI | N11E52 | |
| 2005/08/28 | 26 | 130 | DAI | N11E40 | |
| 2005/08/29 | 37 | 100 | DSI | N11E27 | |
| 2005/08/30 | 13 | 50 | DAO | N11E14 | |
| 2005/08/31 | 19 | 40 | DAI | N11E01 | |
| 2005/09/01 | 8 | 20 | BXO | N11W13 |
| B | C | M |
|---|---|---|
| 11 | 7 | 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M9.16 | 2005/08/25 | 04:31 | 04:40 | 04:45 | |
| 2 | M2.41 | 2005/08/28 | 10:17 | 10:28 | 10:37 | |
| 3 | C3.41 | 2005/08/26 | 21:52 | 22:02 | 22:08 | |
| 4 | C3.1 | 2005/08/26 | 11:39 | 11:55 | 12:10 | |
| 5 | C2.99 | 2005/09/04 | 14:08 | 15:06 | 16:21 | |
| 6 | C2.87 | 2005/08/31 | 10:26 | 11:51 | 12:51 | |
| 7 | C2.02 | 2005/08/27 | 20:36 | 20:51 | 21:05 | |
| 8 | C1.97 | 2005/08/26 | 02:41 | 03:12 | 03:38 | |
| 9 | C1.17 | 2005/08/28 | 10:59 | 11:02 | 11:05 | |
| 10 | B8.3 | 2005/08/25 | 14:21 | 14:28 | 14:35 |
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| Last X-flare | 2026/02/04 | X4.3 |
| Last M-flare | 2026/02/05 | M1.1 |
| Last geomagnetic storm | 2026/02/05 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| February 2026 | 140.8 +16.8 |
| Last 30 days | 124.4 +17 |