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Geomagnetic activity in October 2018
Mean Ap6.5No. 1039 of 1138
G1+ days2
G3+ days0
Max Ap247 Oct 2018
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Oct 2018 | 5+ | 24 | G1 |
| 10 Oct 2018 | 5- | 15 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 2017 | 10.3 | 7 | 0 |
| October 2018 | 6.5 | 2 | 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 6.5 in October 2018, No. 1039 of 1138 months since 1932; 2 days reached G1 or higher.