Sunspot region AR11428
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2012/03/04 | 4 | 40 | CRO | S17E51 | |
| 2012/03/05 | 6 | 70 | DSO | S17E37 | |
| 2012/03/06 | 14 | 250 | DAI | S17E21 | |
| 2012/03/07 | 17 | 250 | DAI | S16E09 | |
| 2012/03/08 | 16 | 300 | DKO | S17W05 | |
| 2012/03/09 | 8 | 180 | DAO | S17W19 | |
| 2012/03/10 | 12 | 110 | DSO | S17W32 | |
| 2012/03/11 | 14 | 60 | CRO | S17W46 | |
| 2012/03/12 | 3 | 30 | CAO | S15W60 | |
| 2012/03/13 | 1 | 30 | HSX | S15W72 |
| C | M |
|---|---|
| 3 | 1 |
The top 4 solar flares from sunspot region 11428
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.05 | 2012/03/08 | 02:49 | 02:53 | 02:56 | |
| 2 | C7.33 | 2012/03/09 | 21:45 | 21:50 | 21:56 | |
| 3 | C2.78 | 2012/03/10 | 06:53 | 07:02 | 07:06 | |
| 4 | C2.3 | 2012/03/11 | 04:26 | 04:28 | 04:32 |
Latest news
Monday, 30 March 2026
X1.5 solar flare
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Sunday, 1 February 2026
Complex sunspot region 4366
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/03 | M1.3 |
| Last geomagnetic storm | 2026/04/02 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 141 +55.1 |
| Last 30 days | 95.4 +31.2 |
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