| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/10/03 | 4 | 160 | CSO | N21E70 | |
| 1999/10/04 | 5 | 200 | CSO | N20E60 | |
| 1999/10/05 | 6 | 240 | CSO | N19E46 | |
| 1999/10/06 | 5 | 230 | CSO | N20E32 | |
| 1999/10/07 | 9 | 200 | CSO | N21E17 | |
| 1999/10/08 | 2 | 190 | HSX | N21E05 | |
| 1999/10/09 | 3 | 200 | CSO | N22W09 | |
| 1999/10/10 | 11 | 170 | CAO | N22W20 | |
| 1999/10/11 | 7 | 160 | CAO | N21W34 | |
| 1999/10/12 | 6 | 180 | CKO | N23W47 | |
| 1999/10/13 | 4 | 150 | CSO | N23W62 | |
| 1999/10/14 | 2 | 140 | HAX | N22W74 | |
| 1999/10/15 | 3 | 100 | CSO | N22W83 |
| C |
|---|
| 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C5.2 | 1999/10/02 | 18:11 | 18:28 | 18:42 | |
| 2 | C4.37 | 1999/10/03 | 15:08 | 15:45 | 16:25 | |
| 3 | C3.29 | 1999/10/07 | 05:19 | 05:22 | 05:27 |
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| 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 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |