Aurora & Space WeatherHome › Geomagnetic history › 1970
Geomagnetic activity in December 1970
Mean Ap8.9No. 859 of 1138
G1+ days3
G3+ days1
Max Ap6514 Dec 1970
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Dec 1970 | 5- | 19 | G1 |
| 14 Dec 1970 | 8+ | 65 | G4 |
| 24 Dec 1970 | 5- | 14 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1969 | 6.8 | 0 | 0 |
| December 1970 | 8.9 | 3 | 1 |
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 8.9 in December 1970, No. 859 of 1138 months since 1932; 3 days reached G1 or higher.