Sunspot region AR11281
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2011/08/29 | 2 | 60 | CSO | S21E65 | |
| 2011/08/30 | 5 | 30 | CRO | S19E54 | |
| 2011/08/31 | 5 | 10 | BXO | S20E40 | |
| 2011/09/01 | 11 | 100 | CSI | S20E28 | |
| 2011/09/02 | 16 | 160 | DAO | S21E12 | |
| 2011/09/03 | 10 | 110 | DAO | S20E01 | |
| 2011/09/04 | 8 | 90 | DAO | S19W10 | |
| 2011/09/05 | 5 | 70 | CAO | S19W24 | |
| 2011/09/06 | 3 | 50 | CSO | S18W39 | |
| 2011/09/07 | 2 | 10 | BXO | S18W51 | |
| 2011/09/08 | 2 | 10 | BXO | S15W59 |
| B | C |
|---|---|
| 3 | 6 |
The top 9 solar flares from sunspot region 11281
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C7.88 | 2011/08/30 | 22:02 | 22:46 | 22:53 | |
| 2 | C3.46 | 2011/09/03 | 07:47 | 07:56 | 08:04 | |
| 3 | C2.74 | 2011/12/22 | 13:04 | 13:20 | 13:41 | |
| 4 | C2.69 | 2011/09/02 | 15:09 | 15:16 | 15:21 | |
| 5 | C1.75 | 2011/09/03 | 20:04 | 20:10 | 20:17 | |
| 6 | C1.19 | 2011/09/03 | 08:56 | 08:59 | 09:05 | |
| 7 | B8.91 | 2011/09/02 | 00:04 | 00:09 | 00:15 | |
| 8 | B7.67 | 2011/08/28 | 13:56 | 14:00 | 14:04 | |
| 9 | B4.75 | 2011/08/28 | 19:58 | 20:02 | 20:06 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | M1.3 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| 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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| April 2026 | 133.3 +47.4 |
| Last 30 days | 96.1 +32 |
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