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Geomagnetic activity in December 2015
Mean Ap14.3No. 403 of 1138
G1+ days6
G3+ days2
Max Ap7020 Dec 2015
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Dec 2015 | 5o | 24 | G1 |
| 14 Dec 2015 | 5+ | 20 | G1 |
| 15 Dec 2015 | 5- | 16 | G1 |
| 20 Dec 2015 | 7- | 70 | G3 |
| 21 Dec 2015 | 7- | 38 | G3 |
| 31 Dec 2015 | 6- | 35 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 2014 | 11.2 | 4 | 0 |
| December 2015 | 14.3 | 6 | 2 |
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.
About this page
Mean Ap 14.3 in December 2015, No. 403 of 1138 months since 1932; 6 days reached G1 or higher.