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Geomagnetic activity in October 2017
Mean Ap10.3No. 721 of 1138
G1+ days7
G3+ days0
Max Ap3713 Oct 2017
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 11 Oct 2017 | 5- | 28 | G1 |
| 12 Oct 2017 | 5o | 26 | G1 |
| 13 Oct 2017 | 6- | 37 | G2 |
| 14 Oct 2017 | 5o | 30 | G1 |
| 15 Oct 2017 | 5+ | 25 | G1 |
| 24 Oct 2017 | 5- | 18 | G1 |
| 25 Oct 2017 | 5- | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 2016 | 15.3 | 8 | 0 |
| October 2017 | 10.3 | 7 | 0 |
Dates and time slots are UTC. Kp is the 3-hourly planetary geomagnetic index (0–9); Ap is the daily average disturbance. G1–G5 follow the NOAA storm scale (Kp 5- and above counted as G1). Aurora visibility also depends on weather and location. The latest values are preliminary.
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About this page
Mean Ap 10.3 in October 2017, No. 721 of 1138 months since 1932; 7 days reached G1 or higher.