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Geomagnetic activity in May 1959
Mean Ap18.9No. 182 of 1138
G1+ days11
G3+ days2
Max Ap10812 May 1959
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 May 1959 | 5o | 16 | G1 |
| 5 May 1959 | 6+ | 29 | G2 |
| 8 May 1959 | 5+ | 33 | G1 |
| 11 May 1959 | 6o | 26 | G2 |
| 12 May 1959 | 8+ | 108 | G4 |
| 15 May 1959 | 5+ | 33 | G1 |
| 16 May 1959 | 6o | 36 | G2 |
| 18 May 1959 | 5o | 24 | G1 |
| 24 May 1959 | 7+ | 52 | G3 |
| 25 May 1959 | 6+ | 25 | G2 |
| 31 May 1959 | 5o | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1958 | 17.5 | 8 | 2 |
| May 1959 | 18.9 | 11 | 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 18.9 in May 1959, No. 182 of 1138 months since 1932; 11 days reached G1 or higher.