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Geomagnetic activity in May 1964
Mean Ap10.5No. 705 of 1138
G1+ days9
G3+ days0
Max Ap3125 May 1964
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 1964 | 6o | 23 | G2 |
| 10 May 1964 | 5- | 20 | G1 |
| 11 May 1964 | 5+ | 19 | G1 |
| 13 May 1964 | 5+ | 18 | G1 |
| 14 May 1964 | 6- | 27 | G2 |
| 15 May 1964 | 6o | 28 | G2 |
| 16 May 1964 | 5- | 21 | G1 |
| 24 May 1964 | 5- | 21 | G1 |
| 25 May 1964 | 6+ | 31 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1963 | 11.0 | 3 | 0 |
| May 1964 | 10.5 | 9 | 0 |
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 10.5 in May 1964, No. 705 of 1138 months since 1932; 9 days reached G1 or higher.