Sunspot region AR8131
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/01/11 | 4 | 10 | BXO | S26E19 | |
| 1998/01/12 | 6 | 20 | BXO | S24E10 | |
| 1998/01/13 | 25 | 190 | DRI | S23E04 | |
| 1998/01/14 | 20 | 150 | DSI | S22W10 | |
| 1998/01/15 | 21 | 180 | DSI | S22W22 | |
| 1998/01/16 | 24 | 340 | EAI | S23W35 | |
| 1998/01/17 | 18 | 290 | EKI | S24W49 | |
| 1998/01/18 | 10 | 230 | DKO | S23W61 | |
| 1998/01/19 | 5 | 180 | CAO | S23W74 | |
| 1998/01/20 | 4 | 50 | BXO | S24W88 |
| B | C | M |
|---|---|---|
| 4 | 11 | 1 |
The top 10 solar flares from sunspot region 8131
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.43 | 1998/01/15 | 14:28 | 14:38 | 14:47 | |
| 2 | C9.03 | 1998/01/15 | 09:26 | 09:36 | 10:06 | |
| 3 | C5.99 | 1998/01/12 | 02:02 | 02:20 | 02:30 | |
| 4 | C5.44 | 1998/01/14 | 15:26 | 16:03 | 16:15 | |
| 5 | C5.13 | 1998/01/12 | 11:28 | 11:42 | 11:49 | |
| 6 | C4.2 | 1998/01/12 | 15:09 | 15:18 | 15:24 | |
| 7 | C3.01 | 1998/01/14 | 20:22 | 20:38 | 20:48 | |
| 8 | C1.84 | 1998/01/15 | 13:03 | 13:12 | 13:24 | |
| 9 | C1.71 | 1998/01/12 | 20:57 | 21:13 | 21:24 | |
| 10 | C1.69 | 1998/01/14 | 13:08 | 13:11 | 13:15 |
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| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/04/27 | M1.0 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
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| Last 30 days | 90.9 +8.3 |
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