Aurora & Space WeatherGeomagnetic activity in 1974
Mean Ap19.6
G1+147days
G3+10days
G51days
G1+ days by month
- January 1974
- February 1974
- March 1974
- April 1974
- May 1974
- June 1974
- July 1974
- August 1974
- September 1974
- October 1974
- November 1974
- December 1974
Nearby years (G1+ days)
52
60
65
67
116
147
91
72
66
111
88
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Jul 1974 | 9- | 130 | G5 |
| 16 Sep 1974 | 8o | 88 | G4 |
| 13 Oct 1974 | 7o | 86 | G3 |
| 23 Jul 1974 | 7o | 82 | G3 |
| 5 Jul 1974 | 7- | 74 | G3 |
| 15 Sep 1974 | 8- | 73 | G4 |
| 12 Nov 1974 | 6+ | 70 | G2 |
| 21 Mar 1974 | 7- | 68 | G3 |
| 16 Oct 1974 | 7o | 68 | G3 |
| 27 Jun 1974 | 6+ | 54 | 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
1974 had 147 G1+ storm days (No. 6 of 95 years) and 10 G3+ days.