| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/09/17 | 2 | 40 | CSO | S30E52 | |
| 1998/09/18 | 3 | 30 | CSO | S28E37 | |
| 1998/09/19 | 8 | 40 | DSO | S25E25 | |
| 1998/09/20 | 10 | 80 | DSO | S30E11 | |
| 1998/09/21 | 15 | 70 | DSI | S29W02 | |
| 1998/09/22 | 19 | 90 | CSO | S30W13 | |
| 1998/09/23 | 13 | 70 | DSO | S29W27 | |
| 1998/09/24 | 10 | 50 | CAO | S29W40 | |
| 1998/09/25 | 5 | 30 | CSO | S28W54 | |
| 1998/09/26 | 2 | 10 | BXO | S27W67 |
| C |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C2.2 | 1998/09/20 | 09:44 | 09:49 | 09:53 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/21 | M1.3 |
| Last geomagnetic storm | 2025/12/22 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 114.8 +23 |
| Last 30 days | 109.3 +22.9 |