Sunspot region AR8552
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/05/25 | 3 | 200 | CHO | N20E68 | |
| 1999/05/26 | 4 | 270 | CSO | N20E54 | |
| 1999/05/27 | 6 | 330 | CHO | N11E41 | |
| 1999/05/28 | 16 | 360 | EKO | N20E25 | |
| 1999/05/29 | 13 | 170 | EAI | N21E06 | |
| 1999/05/30 | 16 | 180 | DAI | N18W06 | |
| 1999/05/31 | 11 | 200 | DAO | N19W18 | |
| 1999/06/01 | 11 | 150 | CSO | N18W32 | |
| 1999/06/02 | 5 | 250 | DSO | N18W44 | |
| 1999/06/03 | 6 | 250 | CSO | N20W57 | |
| 1999/06/04 | 5 | 290 | CAO | N20W72 | |
| 1999/06/05 | 4 | 250 | DAO | N19W86 |
| C | M |
|---|---|
| 10 | 1 |
The top 10 solar flares from sunspot region 8552
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M5.63 | 1999/06/04 | 06:52 | 07:03 | 07:11 | |
| 2 | C5 | 1999/05/27 | 12:59 | 13:04 | 13:09 | |
| 3 | C4.74 | 1999/05/24 | 17:05 | 17:14 | 17:26 | |
| 4 | C4.1 | 1999/05/31 | 09:33 | 09:40 | 09:45 | |
| 5 | C3.87 | 1999/05/26 | 08:53 | 08:57 | 08:59 | |
| 6 | C3.39 | 1999/05/27 | 18:33 | 18:59 | 19:13 | |
| 7 | C2.54 | 1999/05/24 | 08:57 | 09:01 | 09:04 | |
| 8 | C2.19 | 1999/06/03 | 20:58 | 21:01 | 21:06 | |
| 9 | C1.97 | 1999/06/05 | 01:35 | 01:40 | 01:45 | |
| 10 | C1.49 | 1999/05/30 | 18:14 | 18:24 | 18:31 |
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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 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |