| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2012/12/13 | 5 | 10 | CRO | N16W14 | |
| 2012/12/14 | 5 | 20 | BXO | N17W28 | |
| 2012/12/15 | 4 | 10 | BXO | N17W42 | |
| 2012/12/16 | 1 | 0 | AXX | N17W56 | |
| 2012/12/18 | 6 | 50 | CAO | N19W84 |
| B | C |
|---|---|
| 1 | 6 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.89 | 2012/12/17 | 00:16 | 00:27 | 00:29 | |
| 2 | C1.72 | 2012/12/13 | 19:11 | 19:22 | 19:33 | |
| 3 | C1.5 | 2012/12/16 | 22:07 | 22:11 | 22:15 | |
| 4 | C1.5 | 2012/12/17 | 01:15 | 01:21 | 01:27 | |
| 5 | C1.35 | 2012/12/17 | 13:44 | 13:51 | 14:06 | |
| 6 | C1.09 | 2012/12/15 | 22:19 | 22:23 | 22:26 | |
| 7 | B9.29 | 2012/12/16 | 23:20 | 23:23 | 23:25 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| 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 | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 107.7 +21.8 |
| Last 30 days | 100 +44.8 |