| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/08/30 | 1 | 40 | HSX | N18E65 | |
| 1999/08/31 | 2 | 20 | CSO | N18E51 | |
| 1999/09/01 | 1 | 10 | HSX | N19E37 | |
| 1999/09/02 | 5 | 20 | CSO | N18E26 | |
| 1999/09/03 | 3 | 10 | CRO | N18E11 | |
| 1999/09/04 | 6 | 10 | BXO | N18W02 | |
| 1999/09/05 | 11 | 40 | DSO | N17W14 | |
| 1999/09/06 | 15 | 60 | DSO | N18W28 | |
| 1999/09/07 | 13 | 50 | DAO | N17W41 | |
| 1999/09/08 | 11 | 40 | BXO | N18W55 | |
| 1999/09/09 | 4 | 20 | CSO | N18W69 | |
| 1999/09/10 | 3 | 30 | CRO | N18W85 |
| B |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | B8.96 | 1999/09/06 | 12:07 | 12:13 | 12:19 |
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| Last X-flare | 2026/02/03 | X1.5 |
| Last M-flare | 2026/02/03 | M3.4 |
| 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 | 133 +9 |
| Last 30 days | 120.6 +10.9 |