Aurora & Space WeatherGeomagnetic activity in 1984
Mean Ap18.8
G1+139days
G3+15days
G50days
G1+ days by month
- January 1984
- February 1984
- March 1984
- April 1984
- May 1984
- June 1984
- July 1984
- August 1984
- September 1984
- October 1984
- November 1984
- December 1984
Nearby years (G1+ days)
88
58
97
159
140
139
83
71
56
59
123
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 23 Sep 1984 | 7o | 112 | G3 |
| 16 Nov 1984 | 8o | 112 | G4 |
| 26 Apr 1984 | 8- | 103 | G4 |
| 4 Apr 1984 | 8- | 84 | G4 |
| 1 Aug 1984 | 7o | 75 | G3 |
| 19 Oct 1984 | 7- | 75 | G3 |
| 5 Sep 1984 | 7o | 63 | G3 |
| 20 Oct 1984 | 7- | 63 | G3 |
| 13 Jul 1984 | 7o | 62 | G3 |
| 28 Mar 1984 | 7+ | 60 | G3 |
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
1984 had 139 G1+ storm days (No. 9 of 95 years) and 15 G3+ days.