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Geomagnetic activity in May 1978
Mean Ap24.6No. 67 of 1138
G1+ days13
G3+ days5
Max Ap964 May 1978
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 1978 | 8+ | 88 | G4 |
| 2 May 1978 | 7+ | 94 | G3 |
| 3 May 1978 | 7o | 83 | G3 |
| 4 May 1978 | 8- | 96 | G4 |
| 9 May 1978 | 8- | 85 | G4 |
| 10 May 1978 | 5- | 10 | G1 |
| 11 May 1978 | 6o | 30 | G2 |
| 13 May 1978 | 5- | 11 | G1 |
| 21 May 1978 | 6o | 26 | G2 |
| 22 May 1978 | 5o | 24 | G1 |
| 23 May 1978 | 5+ | 24 | G1 |
| 24 May 1978 | 5- | 26 | G1 |
| 30 May 1978 | 5o | 18 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1977 | 11.4 | 6 | 0 |
| May 1978 | 24.6 | 13 | 5 |
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 24.6 in May 1978, No. 67 of 1138 months since 1932; 13 days reached G1 or higher.