| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2015/12/11 | 3 | 120 | DAO | S15E65 | |
| 2015/12/12 | 4 | 70 | DAO | S14E52 | |
| 2015/12/13 | 5 | 40 | DAO | S15E39 | |
| 2015/12/14 | 4 | 40 | CAO | S15E26 | |
| 2015/12/15 | 3 | 30 | CAO | S15E12 | |
| 2015/12/16 | 3 | 10 | CRO | S15W02 | |
| 2015/12/17 | 5 | 30 | CRO | S16W13 | |
| 2015/12/18 | 3 | 20 | CRO | S17W27 | |
| 2015/12/19 | 1 | 10 | AXX | S16W41 | |
| 2015/12/20 | 1 | 10 | AXX | S15W54 | |
| 2015/12/21 | 1 | 0 | AXX | S14W67 |
| B | C |
|---|---|
| 5 | 12 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C9.54 | 2015/12/16 | 08:34 | 09:03 | 09:23 | |
| 2 | C7.56 | 2015/12/13 | 08:25 | 10:34 | 11:28 | |
| 3 | C7.45 | 2015/12/12 | 05:05 | 05:28 | 05:40 | |
| 4 | C5.54 | 2015/12/10 | 07:41 | 07:50 | 07:57 | |
| 5 | C4.5 | 2015/12/19 | 01:59 | 02:04 | 02:08 | |
| 6 | C3.51 | 2015/12/20 | 19:22 | 19:44 | 19:58 | |
| 7 | C2.99 | 2015/12/12 | 11:39 | 11:45 | 11:53 | |
| 8 | C2.03 | 2015/12/11 | 04:22 | 04:47 | 05:15 | |
| 9 | C1.76 | 2015/12/15 | 21:33 | 22:00 | 22:25 | |
| 10 | C1.23 | 2015/12/14 | 14:31 | 14:41 | 14:53 |
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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 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |