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Geomagnetic activity in February 1977
Mean Ap11.0No. 659 of 1138
G1+ days2
G3+ days0
Max Ap259 Feb 1977
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 18 Feb 1977 | 5+ | 17 | G1 |
| 24 Feb 1977 | 5o | 14 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1976 | 16.8 | 9 | 0 |
| February 1977 | 11.0 | 2 | 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 11.0 in February 1977, No. 659 of 1138 months since 1932; 2 days reached G1 or higher.