Aurora & Space WeatherHome › Geomagnetic history › 1964
Geomagnetic activity in July 1964
Mean Ap9.2No. 823 of 1138
G1+ days4
G3+ days0
Max Ap2418 Jul 1964
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Jul 1964 | 5- | 18 | G1 |
| 17 Jul 1964 | 6- | 22 | G2 |
| 18 Jul 1964 | 5o | 24 | G1 |
| 29 Jul 1964 | 5- | 16 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 1963 | 11.9 | 6 | 0 |
| July 1964 | 9.2 | 4 | 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 9.2 in July 1964, No. 823 of 1138 months since 1932; 4 days reached G1 or higher.