| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2013/03/28 | 2 | 50 | CSO | N12E71 | |
| 2013/03/29 | 4 | 90 | DAO | N11E58 | |
| 2013/03/30 | 4 | 90 | CSO | N11E45 | |
| 2013/03/31 | 4 | 50 | CSO | N11E30 | |
| 2013/04/01 | 2 | 40 | HAX | N11E16 | |
| 2013/04/02 | 4 | 20 | CSO | N10E03 | |
| 2013/04/03 | 4 | 20 | DRO | N10W11 | |
| 2013/04/04 | 1 | 10 | AXX | N13W25 | |
| 2013/04/05 | 1 | 10 | AXX | N13W39 |
| B | C |
|---|---|
| 3 | 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C3.95 | 2013/04/03 | 09:36 | 09:43 | 09:48 | |
| 2 | C1.55 | 2013/04/03 | 04:30 | 04:39 | 04:48 | |
| 3 | C1.1 | 2013/04/02 | 22:02 | 22:08 | 22:12 | |
| 4 | B7.26 | 2013/03/28 | 03:03 | 03:38 | 04:24 | |
| 5 | B4.25 | 2013/03/28 | 00:34 | 00:44 | 00:52 | |
| 6 | B3.43 | 2013/03/27 | 18:37 | 18:47 | 19:11 |
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| Last X-flare | 2026/02/03 | X1.5 |
| Last M-flare | 2026/02/03 | M3.4 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| February 2026 | 114 -10 |
| Last 30 days | 118.8 +9.2 |