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Geomagnetic activity in October 2021
Mean Ap7.3No. 986 of 1138
G1+ days2
G3+ days0
Max Ap4612 Oct 2021
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Oct 2021 | 5- | 11 | G1 |
| 12 Oct 2021 | 6+ | 46 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 2020 | 6.0 | 1 | 0 |
| October 2021 | 7.3 | 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 7.3 in October 2021, No. 986 of 1138 months since 1932; 2 days reached G1 or higher.