| Sunspot number | New regions | Background flux | C | M | X |
|---|---|---|---|---|---|
| 223 | 1 | C6.5 | 2 | 4 | 3 |
| Region | Start | Maximum | End | |
|---|---|---|---|---|
| 9393 | M3.2 | 00:14 | 00:28 | 00:40 |
| 9393 | C5.5 | 04:03 | 04:08 | 04:11 |
| 9393 | M1.0 | 05:25 | 05:28 | 05:32 |
| 9393 | C8.5 | 09:19 | 09:31 | 09:37 |
| 9393 | M1.9 | 09:45 | 09:52 | 09:59 |
| 9393 | X1.4 | 10:04 | 10:14 | 10:20 |
| 9393 | X1.1 | 10:58 | 11:36 | 12:05 |
| 9393 | M2.1 | 18:08 | 18:50 | 19:20 |
| 9393 | X20.0 Play | 21:32 | 21:51 | 22:03 |
| Auroral activity | Minor | Severe |
|---|---|---|
| High latitude | 20% | 15% |
| Middle latitude | 1% | 1% |
| Predicted Kp max | 2 |
| Solar activity | |
|---|---|
| M-class solar flare | 1% |
| X-class solar flare | 1% |
| Moon phase |
|---|
| New Moon |
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| Last X-flare: | 2017/09/10 | X8.2 |
| Last M-flare: | 2017/09/09 | M1.1 |
| Last geomagnetic storm: | 2017/09/18 | Kp5 (G1) |
| Number of spotless days in 2017: | 56 | |
| Last spotless day: | 2017/08/01 | |
