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Geomagnetic activity in December 1948
Mean Ap13.0No. 499 of 1138
G1+ days9
G3+ days0
Max Ap3325 Dec 1948
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Dec 1948 | 5- | 24 | G1 |
| 13 Dec 1948 | 5- | 13 | G1 |
| 14 Dec 1948 | 5+ | 26 | G1 |
| 21 Dec 1948 | 5- | 26 | G1 |
| 24 Dec 1948 | 6- | 20 | G2 |
| 25 Dec 1948 | 6- | 33 | G2 |
| 26 Dec 1948 | 5o | 15 | G1 |
| 30 Dec 1948 | 5o | 21 | G1 |
| 31 Dec 1948 | 6o | 29 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1947 | 10.6 | 3 | 0 |
| December 1948 | 13.0 | 9 | 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 13.0 in December 1948, No. 499 of 1138 months since 1932; 9 days reached G1 or higher.