Aurora & Space WeatherHome › Geomagnetic history › 1974
Geomagnetic activity in February 1974
Mean Ap16.2No. 287 of 1138
G1+ days10
G3+ days0
Max Ap4423 Feb 1974
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Feb 1974 | 5- | 14 | G1 |
| 11 Feb 1974 | 5+ | 30 | G1 |
| 12 Feb 1974 | 6- | 40 | G2 |
| 21 Feb 1974 | 5- | 23 | G1 |
| 22 Feb 1974 | 5o | 14 | G1 |
| 23 Feb 1974 | 6o | 44 | G2 |
| 24 Feb 1974 | 6- | 29 | G2 |
| 25 Feb 1974 | 5o | 34 | G1 |
| 26 Feb 1974 | 5o | 28 | G1 |
| 27 Feb 1974 | 5o | 26 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1973 | 20.2 | 10 | 1 |
| February 1974 | 16.2 | 10 | 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 16.2 in February 1974, No. 287 of 1138 months since 1932; 10 days reached G1 or higher.