| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2009/12/15 | 4 | 20 | BXO | N31E07 | |
| 2009/12/16 | 16 | 120 | DAI | N30W05 | |
| 2009/12/17 | 20 | 140 | EAC | N30W18 | |
| 2009/12/18 | 14 | 210 | EAC | N30W32 | |
| 2009/12/19 | 10 | 310 | ESI | N30W45 | |
| 2009/12/20 | 8 | 220 | EHO | N30W56 | |
| 2009/12/21 | 4 | 310 | EHO | N31W70 | |
| 2009/12/22 | 2 | 90 | FSO | N31W85 |
| B | C | M |
|---|---|---|
| 20 | 6 | 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.08 | 2009/12/18 | 18:48 | 18:55 | 18:58 | |
| 2 | C7.57 | 2009/12/16 | 01:02 | 01:24 | 01:35 | |
| 3 | C5.29 | 2009/12/16 | 12:36 | 13:02 | 13:20 | |
| 4 | C4.3 | 2009/12/19 | 00:10 | 00:14 | 00:17 | |
| 5 | C1.38 | 2009/12/17 | 15:01 | 15:13 | 15:17 | |
| 6 | C1.31 | 2009/12/19 | 01:36 | 01:53 | 01:55 | |
| 7 | C1.23 | 2009/12/16 | 08:34 | 08:37 | 08:39 | |
| 8 | B8.06 | 2009/12/18 | 02:04 | 02:13 | 02:17 | |
| 9 | B7.7 | 2009/12/18 | 18:20 | 18:27 | 18:30 | |
| 10 | B7.37 | 2009/12/18 | 16:10 | 16:23 | 16:31 |
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| 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 | 167.7 +75.9 |
| Last 30 days | 107.1 +13.7 |