| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/09/23 | 5 | 10 | BXO | S20E22 | |
| 1998/09/24 | 12 | 60 | DAO | S20E09 | |
| 1998/09/25 | 14 | 70 | DSO | S20W04 | |
| 1998/09/26 | 12 | 70 | FSI | S18W16 | |
| 1998/09/27 | 7 | 70 | CSO | S20W31 | |
| 1998/09/28 | 1 | 30 | HSX | S21W48 | |
| 1998/09/29 | 1 | 40 | HSX | S22W62 | |
| 1998/09/30 | 2 | 20 | CSO | S21W75 |
| C |
|---|
| 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C8.67 | 1998/09/24 | 08:09 | 08:14 | 08:19 | |
| 2 | C2.04 | 1998/09/23 | 22:20 | 22:26 | 22:30 |
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| Last X-flare | 2026/02/03 | X1.5 |
| Last M-flare | 2026/02/03 | M2.5 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| February 2026 | 114 -10 |
| Last 30 days | 118.8 +9.2 |