Sunspot region AR11528
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2012/07/24 | 1 | 60 | HSX | N17E67 | |
| 2012/07/25 | 1 | 80 | HSX | N17E53 | |
| 2012/07/26 | 6 | 80 | CSO | N17E39 | |
| 2012/07/27 | 3 | 40 | CSO | N17E25 | |
| 2012/07/28 | 2 | 30 | HSX | N17E11 | |
| 2012/07/29 | 1 | 40 | HSX | N17W02 | |
| 2012/07/30 | 2 | 40 | HSX | N17W15 | |
| 2012/07/31 | 2 | 30 | CSO | N17W28 | |
| 2012/08/01 | 2 | 10 | HRX | N17W42 | |
| 2012/08/02 | 1 | 10 | HRX | N17W56 | |
| 2012/08/03 | 1 | 20 | HRX | N17W70 | |
| 2012/08/04 | 4 | 10 | BXO | N15W81 |
| B | C |
|---|---|
| 2 | 6 |
The top 8 solar flares from sunspot region 11528
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C7.18 | 2012/07/27 | 03:58 | 04:02 | 04:04 | |
| 2 | C3.56 | 2012/07/30 | 04:16 | 04:24 | 04:28 | |
| 3 | C3.56 | 2012/07/31 | 21:59 | 22:05 | 22:08 | |
| 4 | C3.01 | 2012/07/30 | 08:21 | 08:26 | 08:31 | |
| 5 | C2.22 | 2012/07/30 | 00:47 | 00:54 | 01:01 | |
| 6 | C2.18 | 2012/08/01 | 09:45 | 09:50 | 10:03 | |
| 7 | B9.5 | 2012/07/26 | 09:59 | 10:02 | 10:04 | |
| 8 | B8.44 | 2012/07/25 | 05:58 | 06:02 | 06:07 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| April 2026 | 130 +51.8 |
| Last 30 days | 91.6 +20.3 |
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