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Geomagnetic activity in July 1978
Mean Ap13.0No. 500 of 1138
G1+ days6
G3+ days2
Max Ap804 Jul 1978
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Jul 1978 | 5o | 11 | G1 |
| 4 Jul 1978 | 8o | 80 | G4 |
| 5 Jul 1978 | 7o | 53 | G3 |
| 13 Jul 1978 | 5- | 20 | G1 |
| 14 Jul 1978 | 6- | 48 | G2 |
| 18 Jul 1978 | 5o | 18 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 1977 | 13.6 | 6 | 1 |
| July 1978 | 13.0 | 6 | 2 |
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 July 1978, No. 500 of 1138 months since 1932; 6 days reached G1 or higher.