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Geomagnetic activity in December 2005
Mean Ap8.5No. 890 of 1138
G1+ days3
G3+ days0
Max Ap2111 Dec 2005
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Dec 2005 | 5- | 17 | G1 |
| 11 Dec 2005 | 5- | 21 | G1 |
| 27 Dec 2005 | 5+ | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 2004 | 10.9 | 3 | 0 |
| December 2005 | 8.5 | 3 | 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 8.5 in December 2005, No. 890 of 1138 months since 1932; 3 days reached G1 or higher.