Sunspot region AR8421
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/12/24 | 2 | 90 | HAX | N29E80 | |
| 1998/12/25 | 6 | 120 | DAO | N27E64 | |
| 1998/12/26 | 10 | 170 | DAO | N27E52 | |
| 1998/12/27 | 11 | 270 | DAI | N26E40 | |
| 1998/12/28 | 32 | 290 | EAI | N27E26 | |
| 1998/12/29 | 47 | 360 | EAC | N26E13 | |
| 1998/12/30 | 46 | 610 | EKC | N26E00 | |
| 1998/12/31 | 70 | 710 | EKC | N26W14 | |
| 1999/01/01 | 55 | 670 | EKC | N27W27 | |
| 1999/01/02 | 43 | 660 | EKC | N27W37 | |
| 1999/01/03 | 35 | 580 | EKC | N26W53 | |
| 1999/01/04 | 32 | 560 | FKC | N26W67 | |
| 1999/01/05 | 17 | 400 | EAO | N26W79 | |
| 1999/01/06 | 4 | 180 | EAO | N26W89 |
| C | M |
|---|---|
| 27 | 5 |
The top 10 solar flares from sunspot region 8421
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M2.49 | 1998/12/24 | 11:29 | 11:45 | 12:14 | |
| 2 | M1.83 | 1998/12/25 | 05:31 | 06:34 | 07:27 | |
| 3 | M1.81 | 1998/12/28 | 23:15 | 23:22 | 23:33 | |
| 4 | M1.47 | 1998/12/30 | 05:26 | 05:46 | 06:00 | |
| 5 | M1.11 | 1999/01/01 | 13:54 | 14:03 | 14:17 | |
| 6 | C7.33 | 1998/12/29 | 09:23 | 09:41 | 09:53 | |
| 7 | C6.31 | 1998/12/26 | 14:47 | 15:07 | 15:24 | |
| 8 | C5.87 | 1998/12/31 | 07:17 | 07:20 | 07:25 | |
| 9 | C4.94 | 1999/01/01 | 12:00 | 12:45 | 13:34 | |
| 10 | C4.73 | 1998/12/27 | 03:07 | 03:12 | 03:21 |
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| Last geomagnetic storm | 2024/04/26 | Kp5+ (G1) |
| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |
| Last 30 days | 139 +32.6 |