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Geomagnetic activity in February 1978
Mean Ap15.9No. 311 of 1138
G1+ days6
G3+ days1
Max Ap4815 Feb 1978
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 15 Feb 1978 | 7+ | 48 | G3 |
| 22 Feb 1978 | 5- | 22 | G1 |
| 25 Feb 1978 | 5- | 12 | G1 |
| 26 Feb 1978 | 5o | 37 | G1 |
| 27 Feb 1978 | 6- | 42 | G2 |
| 28 Feb 1978 | 6+ | 46 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1977 | 11.0 | 2 | 0 |
| February 1978 | 15.9 | 6 | 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 15.9 in February 1978, No. 311 of 1138 months since 1932; 6 days reached G1 or higher.