| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2015/04/12 | 5 | 200 | EAC | N12E68 | |
| 2015/04/13 | 11 | 610 | EKC | N13E54 | |
| 2015/04/14 | 14 | 620 | EKC | N13E40 | |
| 2015/04/15 | 14 | 620 | EKC | N13E26 | |
| 2015/04/16 | 20 | 480 | EKC | N12E16 | |
| 2015/04/17 | 16 | 380 | EKC | N12E02 | |
| 2015/04/18 | 17 | 320 | EKC | N11W08 | |
| 2015/04/19 | 16 | 180 | EAC | N11W22 | |
| 2015/04/20 | 33 | 130 | EAI | N11W36 | |
| 2015/04/21 | 9 | 80 | CSO | N10W49 | |
| 2015/04/22 | 1 | 30 | HSX | N07W58 | |
| 2015/04/23 | 1 | 30 | HSX | N07W73 | |
| 2015/04/24 | 1 | 30 | HSX | N08W84 | |
| 2015/04/25 | 1 | 30 | HSX | N08W98 |
| C | M |
|---|---|
| 21 | 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.66 | 2015/04/12 | 08:51 | 09:50 | 10:44 | |
| 2 | M1.29 | 2015/04/12 | 17:58 | 18:07 | 18:10 | |
| 3 | M1.13 | 2015/04/15 | 20:13 | 20:23 | 20:45 | |
| 4 | C7.43 | 2015/04/18 | 14:03 | 14:19 | 14:39 | |
| 5 | C6.74 | 2015/04/11 | 02:29 | 02:41 | 02:55 | |
| 6 | C4.19 | 2015/04/12 | 08:11 | 08:16 | 08:27 | |
| 7 | C4.18 | 2015/04/18 | 18:09 | 18:25 | 18:38 | |
| 8 | C4.15 | 2015/04/12 | 01:13 | 01:21 | 01:27 | |
| 9 | C3.43 | 2015/04/20 | 20:40 | 21:16 | 22:15 | |
| 10 | C3.32 | 2015/04/12 | 19:34 | 19:38 | 19:42 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/12 | M1.1 |
| Last geomagnetic storm | 2025/12/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 150 +58.2 |
| Last 30 days | 108.8 +10.3 |