| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2001/10/04 | 3 | 70 | CAO | S12E72 | |
| 2001/10/05 | 7 | 40 | CSO | S15E54 | |
| 2001/10/06 | 10 | 80 | DSO | S14E44 | |
| 2001/10/07 | 18 | 130 | DAO | S15E31 | |
| 2001/10/08 | 19 | 100 | DAO | S14E18 | |
| 2001/10/09 | 17 | 60 | DSO | S14E04 | |
| 2001/10/10 | 10 | 30 | CSO | S16W07 | |
| 2001/10/11 | 7 | 20 | CRO | S15W21 | |
| 2001/10/12 | 4 | 20 | BXO | S16W34 | |
| 2001/10/13 | 2 | 10 | BXO | S12W46 | |
| 2001/10/14 | 2 | 10 | BXO | S17W56 |
| C |
|---|
| 5 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C3.7 | 2001/10/06 | 10:40 | 10:43 | 10:45 | |
| 2 | C2.86 | 2001/10/05 | 13:50 | 13:55 | 13:59 | |
| 3 | C1.81 | 2001/10/07 | 19:27 | 19:28 | 19:31 | |
| 4 | C1.75 | 2001/10/07 | 22:54 | 22:58 | 23:04 | |
| 5 | C1.66 | 2001/10/07 | 16:35 | 16:41 | 16:47 |
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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 | 101.7 +15.8 |
| Last 30 days | 97.2 +38.9 |