Aurora & Space WeatherGeomagnetic activity in 1958
Mean Ap19.2
G1+122days
G3+24days
G53days
G1+ days by month
- January 1958
- February 1958
- March 1958
- April 1958
- May 1958
- June 1958
- July 1958
- August 1958
- September 1958
- October 1958
- November 1958
- December 1958
Nearby years (G1+ days)
108
52
63
122
118
122
133
155
93
75
78
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Jul 1958 | 9o | 200 | G5 |
| 11 Feb 1958 | 9o | 199 | G5 |
| 4 Sep 1958 | 9- | 131 | G5 |
| 29 Jun 1958 | 8o | 103 | G4 |
| 24 Oct 1958 | 7o | 89 | G3 |
| 24 Aug 1958 | 8- | 85 | G4 |
| 17 Aug 1958 | 7+ | 82 | G3 |
| 25 Sep 1958 | 7o | 82 | G3 |
| 7 Jun 1958 | 8- | 77 | G4 |
| 9 Jul 1958 | 7o | 75 | 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
1958 had 122 G1+ storm days (No. 16 of 95 years) and 24 G3+ days.