Aurora & Space WeatherHome › Geomagnetic history › 2016
Geomagnetic activity in December 2016
Mean Ap9.4No. 808 of 1138
G1+ days4
G3+ days0
Max Ap249 Dec 2016
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 Dec 2016 | 5- | 24 | G1 |
| 21 Dec 2016 | 6o | 23 | G2 |
| 22 Dec 2016 | 5- | 22 | G1 |
| 26 Dec 2016 | 5- | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 2015 | 14.3 | 6 | 2 |
| December 2016 | 9.4 | 4 | 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.
About this page
Mean Ap 9.4 in December 2016, No. 808 of 1138 months since 1932; 4 days reached G1 or higher.