Aurora & Space WeatherGeomagnetic activity in 1964
Mean Ap9.9
G1+62days
G3+4days
G50days
G1+ days by month
- January 1964
- February 1964
- March 1964
- April 1964
- May 1964
- June 1964
- July 1964
- August 1964
- September 1964
- October 1964
- November 1964
- December 1964
Nearby years (G1+ days)
133
155
93
75
78
62
30
50
62
74
52
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jan 1964 | 7- | 53 | G3 |
| 4 Mar 1964 | 6o | 52 | G2 |
| 10 Jun 1964 | 7- | 49 | G3 |
| 1 Apr 1964 | 7+ | 46 | G3 |
| 22 Sep 1964 | 8- | 44 | G4 |
| 28 Sep 1964 | 6- | 35 | G2 |
| 4 Aug 1964 | 6+ | 34 | G2 |
| 5 Mar 1964 | 6- | 33 | G2 |
| 28 Apr 1964 | 5+ | 33 | G1 |
| 13 Feb 1964 | 5o | 32 | G1 |
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
1964 had 62 G1+ storm days (No. 59 of 95 years) and 4 G3+ days.