| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2004/04/19 | 8 | 160 | DSO | S08E60 | |
| 2004/04/20 | 21 | 290 | EKI | S09E44 | |
| 2004/04/21 | 20 | 340 | DKO | S09E31 | |
| 2004/04/22 | 22 | 340 | EAI | S07E19 | |
| 2004/04/23 | 24 | 400 | EKO | S08E04 | |
| 2004/04/24 | 20 | 320 | EKO | S08W09 | |
| 2004/04/25 | 15 | 240 | ESO | S09W21 | |
| 2004/04/26 | 8 | 230 | EAO | S08W36 | |
| 2004/04/27 | 3 | 240 | CAO | S08W52 | |
| 2004/04/28 | 1 | 170 | HAX | S08W67 | |
| 2004/04/29 | 2 | 200 | DSO | S08W79 | |
| 2004/04/30 | 1 | 120 | HSX | S07W92 |
| B | C | M |
|---|---|---|
| 8 | 9 | 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.78 | 2004/04/22 | 02:03 | 02:19 | 02:24 | |
| 2 | C6.77 | 2004/04/19 | 18:20 | 18:30 | 18:40 | |
| 3 | C4.76 | 2004/04/19 | 00:28 | 00:34 | 00:37 | |
| 4 | C3.07 | 2004/04/21 | 02:40 | 02:58 | 03:21 | |
| 5 | C2.57 | 2004/04/21 | 16:01 | 16:15 | 16:36 | |
| 6 | C1.66 | 2004/04/22 | 18:19 | 18:24 | 18:32 | |
| 7 | C1.42 | 2004/04/22 | 16:43 | 16:50 | 16:56 | |
| 8 | C1.35 | 2004/04/21 | 14:50 | 14:55 | 15:08 | |
| 9 | C1.3 | 2004/04/18 | 15:55 | 15:59 | 16:21 | |
| 10 | C1.26 | 2004/04/21 | 20:09 | 20:13 | 20:17 |
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| Last X-flare | 2026/02/04 | X4.3 |
| Last M-flare | 2026/02/16 | M2.4 |
| Last geomagnetic storm | 2026/02/15 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| January 2026 | 112.6 -11.4 |
| February 2026 | 109 -3.6 |
| Last 30 days | 126.1 +25.9 |