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Geomagnetic activity in June 1964
Mean Ap8.6No. 881 of 1138
G1+ days3
G3+ days1
Max Ap4910 Jun 1964
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Jun 1964 | 7- | 49 | G3 |
| 11 Jun 1964 | 5- | 25 | G1 |
| 20 Jun 1964 | 5o | 17 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| June 1963 | 10.8 | 5 | 1 |
| June 1964 | 8.6 | 3 | 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 8.6 in June 1964, No. 881 of 1138 months since 1932; 3 days reached G1 or higher.