| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2017/10/22 | 1 | 50 | HAX | S11E74 | |
| 2017/10/23 | 3 | 70 | HAX | S09E58 | |
| 2017/10/24 | 1 | 60 | HAX | S09E45 | |
| 2017/10/25 | 1 | 60 | HSX | S09E31 | |
| 2017/10/26 | 2 | 50 | HSX | S09E17 | |
| 2017/10/27 | 1 | 30 | HSX | S09E04 | |
| 2017/10/28 | 1 | 30 | HRX | S09W09 | |
| 2017/10/29 | 1 | 10 | HRX | S08W22 | |
| 2017/10/30 | 1 | 10 | AXX | S09W34 | |
| 2017/10/31 | 1 | 0 | AXX | S09W49 |
| M |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.59 | 2017/10/20 | 23:10 | 23:28 | 23:36 |
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| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/04/28 | M1.11 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 158 +78.7 |
| Last 30 days | 90.5 -3.1 |