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Geomagnetic activity in August 1978
Mean Ap16.9No. 253 of 1138
G1+ days9
G3+ days1
Max Ap12428 Aug 1978
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Aug 1978 | 6- | 30 | G2 |
| 6 Aug 1978 | 5- | 16 | G1 |
| 12 Aug 1978 | 5o | 21 | G1 |
| 18 Aug 1978 | 6o | 24 | G2 |
| 27 Aug 1978 | 5- | 29 | G1 |
| 28 Aug 1978 | 8+ | 124 | G4 |
| 29 Aug 1978 | 6- | 40 | G2 |
| 30 Aug 1978 | 5+ | 31 | G1 |
| 31 Aug 1978 | 6+ | 45 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 1977 | 13.1 | 6 | 0 |
| August 1978 | 16.9 | 9 | 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 16.9 in August 1978, No. 253 of 1138 months since 1932; 9 days reached G1 or higher.