| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2015/04/18 | 3 | 140 | CSO | S10E70 | |
| 2015/04/19 | 2 | 140 | CSO | S09E57 | |
| 2015/04/20 | 5 | 140 | CSO | S09E44 | |
| 2015/04/21 | 4 | 110 | CSO | S09E30 | |
| 2015/04/22 | 3 | 90 | HSX | S10E17 | |
| 2015/04/23 | 3 | 90 | HSX | S10E03 | |
| 2015/04/24 | 1 | 90 | HSX | S08W10 | |
| 2015/04/25 | 1 | 90 | HSX | S09W24 | |
| 2015/04/26 | 2 | 80 | HSX | S10W37 | |
| 2015/04/27 | 3 | 60 | CSO | S08W49 | |
| 2015/04/28 | 2 | 40 | CSO | S08W63 | |
| 2015/04/29 | 1 | 20 | HSX | S07W77 | |
| 2015/04/30 | 1 | 20 | HSX | S07W77 | |
| 2015/05/01 | 2 | 20 | HSX | S08W0* |
| B | C |
|---|---|
| 2 | 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C3.25 | 2015/04/22 | 07:04 | 07:11 | 07:18 | |
| 2 | C1.39 | 2015/04/29 | 16:20 | 16:34 | 16:52 | |
| 3 | B9.08 | 2015/04/26 | 17:46 | 17:51 | 17:56 | |
| 4 | B8.85 | 2015/04/26 | 13:10 | 13:14 | 13:21 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| April 2026 | 130 +51.8 |
| Last 30 days | 91.6 +20.3 |