Sunspot region AR8471
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/02/24 | 4 | 80 | DAO | N28E55 | |
| 1999/02/25 | 8 | 50 | CSO | N29E41 | |
| 1999/02/26 | 11 | 20 | BXO | N30E26 | |
| 1999/02/27 | 15 | 60 | CRO | N28E15 | |
| 1999/02/28 | 14 | 80 | DSO | N29E01 | |
| 1999/03/01 | 26 | 120 | EAO | N29W12 | |
| 1999/03/02 | 31 | 100 | EAO | N28W27 | |
| 1999/03/03 | 19 | 160 | EAO | N28W39 | |
| 1999/03/04 | 11 | 170 | CAO | N29W53 | |
| 1999/03/05 | 6 | 180 | CAO | N28W64 | |
| 1999/03/06 | 1 | 60 | HAX | N28W83 |
| B | C | M |
|---|---|---|
| 1 | 13 | 1 |
The top 10 solar flares from sunspot region 8471
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M9.44 | 1999/02/28 | 16:31 | 16:39 | 16:43 | |
| 2 | C8.96 | 1999/03/02 | 14:47 | 15:19 | 15:30 | |
| 3 | C6.54 | 1999/03/03 | 03:31 | 03:45 | 03:56 | |
| 4 | C4.46 | 1999/03/01 | 13:29 | 13:37 | 13:48 | |
| 5 | C3.2 | 1999/02/28 | 21:34 | 21:48 | 21:57 | |
| 6 | C2.96 | 1999/03/01 | 05:28 | 05:42 | 06:05 | |
| 7 | C2.91 | 1999/03/03 | 01:22 | 01:28 | 01:37 | |
| 8 | C2.54 | 1999/03/01 | 03:37 | 03:45 | 03:55 | |
| 9 | C2.24 | 1999/02/26 | 20:15 | 20:21 | 20:27 | |
| 10 | C1.69 | 1999/02/26 | 18:56 | 19:09 | 19:15 |
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| Last X-flare | 2024/03/28 | X1.1 |
| Last M-flare | 2024/05/01 | M1.8 |
| Last geomagnetic storm | 2024/04/26 | Kp5+ (G1) |
| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| Last 30 days | 148.1 +49.1 |