Aurora & Space WeatherGeomagnetic activity in 1948
Mean Ap15.4
G1+94days
G3+11days
G50days
G1+ days by month
- January 1948
- February 1948
- March 1948
- April 1948
- May 1948
- June 1948
- July 1948
- August 1948
- September 1948
- October 1948
- November 1948
- December 1948
Nearby years (G1+ days)
128
64
59
102
111
94
92
123
164
150
108
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Aug 1948 | 8- | 146 | G4 |
| 15 Mar 1948 | 8+ | 140 | G4 |
| 19 Oct 1948 | 8- | 94 | G4 |
| 18 Oct 1948 | 8+ | 86 | G4 |
| 10 Aug 1948 | 7o | 74 | G3 |
| 16 May 1948 | 7o | 72 | G3 |
| 21 Oct 1948 | 7- | 67 | G3 |
| 2 Nov 1948 | 6+ | 56 | G2 |
| 15 Oct 1948 | 6- | 51 | G2 |
| 22 Apr 1948 | 7o | 50 | 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
1948 had 94 G1+ storm days (No. 32 of 95 years) and 11 G3+ days.