Aurora & Space WeatherGeomagnetic activity in 1978
Mean Ap16.9
G1+111days
G3+21days
G50days
G1+ days by month
- January 1978
- February 1978
- March 1978
- April 1978
- May 1978
- June 1978
- July 1978
- August 1978
- September 1978
- October 1978
- November 1978
- December 1978
Nearby years (G1+ days)
116
147
91
72
66
111
88
58
97
159
140
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 28 Aug 1978 | 8+ | 124 | G4 |
| 29 Sep 1978 | 8o | 109 | G4 |
| 4 May 1978 | 8- | 96 | G4 |
| 2 May 1978 | 7+ | 94 | G3 |
| 4 Jan 1978 | 7+ | 89 | G3 |
| 1 May 1978 | 8+ | 88 | G4 |
| 9 May 1978 | 8- | 85 | G4 |
| 3 May 1978 | 7o | 83 | G3 |
| 2 Jun 1978 | 7+ | 82 | G3 |
| 4 Jul 1978 | 8o | 80 | G4 |
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
1978 had 111 G1+ storm days (No. 20 of 95 years) and 21 G3+ days.