| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/04/15 | 2 | 10 | AXX | N30W12 | |
| 1998/04/16 | 9 | 100 | DAO | N31W24 | |
| 1998/04/17 | 9 | 50 | DAO | N31W41 | |
| 1998/04/18 | 5 | 30 | CRO | N31W51 | |
| 1998/04/19 | 1 | 0 | AXX | N33W59 |
| M |
|---|
| 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.29 | 1998/04/15 | 14:58 | 15:11 | 15:20 | |
| 2 | M1.15 | 1998/04/15 | 07:37 | 07:46 | 07:54 | |
| 3 | M1.06 | 1998/04/15 | 11:55 | 12:33 | 12:42 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/09 | M1.5 |
| 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 | 160.6 +68.8 |
| Last 30 days | 108 +10.6 |