Aurora & Space WeatherGeomagnetic activity in 1971
Mean Ap11.3
G1+65days
G3+5days
G50days
G1+ days by month
- January 1971
- February 1971
- March 1971
- April 1971
- May 1971
- June 1971
- July 1971
- August 1971
- September 1971
- October 1971
- November 1971
- December 1971
Nearby years (G1+ days)
50
62
74
52
60
65
67
116
147
91
72
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 17 May 1971 | 7- | 73 | G3 |
| 17 Dec 1971 | 7+ | 67 | G3 |
| 9 Apr 1971 | 6o | 53 | G2 |
| 6 May 1971 | 6+ | 50 | G2 |
| 18 Sep 1971 | 7- | 47 | G3 |
| 23 Nov 1971 | 6o | 45 | G2 |
| 25 Feb 1971 | 6o | 43 | G2 |
| 25 Nov 1971 | 6o | 43 | G2 |
| 28 Jan 1971 | 6o | 39 | G2 |
| 13 Mar 1971 | 6- | 39 | G2 |
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
1971 had 65 G1+ storm days (No. 54 of 95 years) and 5 G3+ days.