| Sunspot number | New regions | Background flux | C | M |
|---|---|---|---|---|
| 49 | 0 | B6.7 | 10 | 3 |
| Region | Start | Maximum | End | |
|---|---|---|---|---|
| 2673 | C1.0 | 00:36 | 00:39 | 00:46 |
| 2673 | C6.3 | 03:02 | 03:09 | 03:25 |
| 2673 | C4.2 | 03:57 | 04:01 | 04:07 |
| 2673 | M1.1 | 04:14 | 04:28 | 04:43 |
| 2673 | C1.4 | 06:23 | 06:29 | 06:40 |
| 2673 | C1.7 | 06:51 | 06:56 | 06:58 |
| 2673 | C1.5 | 07:17 | 07:27 | 07:40 |
| 2673 | M3.7 | 10:50 | 11:04 | 11:42 |
| 2673 | C1.4 | 14:49 | 14:53 | 14:58 |
| 2673 | C1.7 | 16:20 | 16:32 | 16:40 |
| - | C1.8 | 19:09 | 19:15 | 19:20 |
| - | C4.7 | 21:00 | 21:11 | 21:25 |
| 2673 | M1.1 | 22:04 | 23:53 | 00:41 |
| Auroral activity | Minor | Severe |
|---|---|---|
| High latitude | 30% | 30% |
| Middle latitude | 5% | 1% |
| Predicted Kp max | 3 |
| Solar activity | |
|---|---|
| M-class solar flare | 1% |
| X-class solar flare | 1% |
| B1.2 B1.7 B1.4 B1.5 B3.2 B5.4 B8.4 | |
| 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 | |
