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Geomagnetic activity in May 1979
Mean Ap13.9No. 438 of 1138
G1+ days7
G3+ days1
Max Ap3622 May 1979
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 May 1979 | 5- | 14 | G1 |
| 19 May 1979 | 5- | 24 | G1 |
| 22 May 1979 | 5+ | 36 | G1 |
| 24 May 1979 | 5o | 27 | G1 |
| 25 May 1979 | 5+ | 34 | G1 |
| 26 May 1979 | 5- | 25 | G1 |
| 29 May 1979 | 7o | 30 | G3 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1978 | 24.6 | 13 | 5 |
| May 1979 | 13.9 | 7 | 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 13.9 in May 1979, No. 438 of 1138 months since 1932; 7 days reached G1 or higher.