| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2017/04/02 | 2 | 10 | BXO | S03E72 | |
| 2017/04/03 | 3 | 20 | CRO | S03E61 | |
| 2017/04/04 | 6 | 30 | DRO | S03E50 | |
| 2017/04/05 | 8 | 30 | CRO | S03E37 | |
| 2017/04/06 | 5 | 50 | BXO | S02E22 | |
| 2017/04/07 | 4 | 20 | BXO | S03E07 | |
| 2017/04/08 | 2 | 0 | AXX | S03W04 |
| B | C |
|---|---|
| 1 | 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C2.79 | 2017/04/04 | 01:28 | 01:32 | 01:36 | |
| 2 | B2.12 | 2017/04/09 | 17:21 | 17:26 | 17:30 |
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| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 114.4 -9.6 |
| Last 30 days | 118.1 +9.1 |