| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2004/09/16 | 1 | 140 | HAX | S13E72 | |
| 2004/09/17 | 15 | 240 | EKI | S12E61 | |
| 2004/09/18 | 19 | 320 | EKO | S13E51 | |
| 2004/09/19 | 14 | 360 | ESO | S13E35 | |
| 2004/09/20 | 15 | 300 | ESO | S13E22 | |
| 2004/09/21 | 18 | 310 | DHO | S13E09 | |
| 2004/09/23 | 14 | 260 | DAO | S13W17 | |
| 2004/09/24 | 9 | 240 | DSO | S13W31 | |
| 2004/09/25 | 5 | 240 | DSO | S13W44 | |
| 2004/09/26 | 3 | 250 | HHX | S13W57 | |
| 2004/09/27 | 1 | 180 | HSX | S14W73 | |
| 2004/09/28 | 1 | 200 | HSX | S15W88 |
| B | C |
|---|---|
| 23 | 4 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C4.67 | 2004/09/22 | 08:54 | 09:20 | 09:36 | |
| 2 | C1.87 | 2004/09/15 | 20:05 | 20:55 | 22:11 | |
| 3 | C1.47 | 2004/09/18 | 16:03 | 16:09 | 16:15 | |
| 4 | C1.07 | 2004/09/18 | 13:52 | 14:01 | 14:08 | |
| 5 | B8.92 | 2004/09/18 | 12:18 | 12:23 | 12:26 | |
| 6 | B7.78 | 2004/09/24 | 02:35 | 02:45 | 03:06 | |
| 7 | B7.43 | 2004/09/15 | 10:02 | 10:09 | 10:15 | |
| 8 | B7.4 | 2004/09/18 | 11:06 | 11:10 | 11:14 | |
| 9 | B7.15 | 2004/09/19 | 00:06 | 00:12 | 00:19 | |
| 10 | B6.99 | 2004/09/18 | 09:30 | 09:38 | 09:41 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/08 | M1.1 |
| 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 | 162.7 +70.9 |
| Last 30 days | 108 +13.3 |