Sunspot region AR8541
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/05/09 | 9 | 130 | ESO | N22E67 | |
| 1999/05/10 | 20 | 190 | EAI | N22E53 | |
| 1999/05/11 | 24 | 230 | EAI | N22E38 | |
| 1999/05/12 | 23 | 170 | FAC | N22E25 | |
| 1999/05/13 | 22 | 130 | ESO | N21E13 | |
| 1999/05/14 | 18 | 90 | ESO | N21W01 | |
| 1999/05/15 | 15 | 80 | ESO | N21W14 | |
| 1999/05/16 | 27 | 100 | ESO | N21W26 | |
| 1999/05/17 | 19 | 130 | EAO | N20W39 | |
| 1999/05/18 | 15 | 230 | EAO | N21W53 | |
| 1999/05/19 | 11 | 180 | DAO | N20W65 | |
| 1999/05/20 | 5 | 90 | DAO | N21W78 |
| C | M |
|---|---|
| 12 | 2 |
The top 10 solar flares from sunspot region 8541
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.64 | 1999/05/09 | 00:36 | 00:47 | 00:58 | |
| 2 | M1.46 | 1999/05/16 | 22:25 | 22:33 | 22:37 | |
| 3 | C8.91 | 1999/05/17 | 17:00 | 17:07 | 17:13 | |
| 4 | C6.06 | 1999/05/08 | 14:01 | 14:08 | 14:14 | |
| 5 | C4.1 | 1999/05/09 | 02:51 | 02:57 | 03:03 | |
| 6 | C3.11 | 1999/05/11 | 20:38 | 20:41 | 20:45 | |
| 7 | C2.97 | 1999/05/11 | 09:29 | 09:35 | 09:44 | |
| 8 | C2.77 | 1999/05/10 | 12:50 | 13:08 | 13:14 | |
| 9 | C2.47 | 1999/05/10 | 15:44 | 15:57 | 16:01 | |
| 10 | C2.36 | 1999/05/17 | 20:01 | 20:16 | 20:21 |
Latest news
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| Last X-flare | 2026/02/04 | X4.21 |
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|---|---|
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| 2026 | 3 days (3%) |
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| Monthly mean Sunspot Number | |
|---|---|
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