Aurora & Space WeatherGeomagnetic activity in 1957
Mean Ap20.1
G1+118days
G3+31days
G57days
G1+ days by month
- January 1957
- February 1957
- March 1957
- April 1957
- May 1957
- June 1957
- July 1957
- August 1957
- September 1957
- October 1957
- November 1957
- December 1957
Nearby years (G1+ days)
150
108
52
63
122
118
122
133
155
93
75
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 23 Sep 1957 | 9- | 164 | G5 |
| 13 Sep 1957 | 9- | 160 | G5 |
| 30 Jun 1957 | 8+ | 150 | G4 |
| 4 Sep 1957 | 9o | 145 | G5 |
| 29 Sep 1957 | 9- | 139 | G5 |
| 3 Sep 1957 | 9- | 135 | G5 |
| 2 Mar 1957 | 8+ | 132 | G4 |
| 5 Sep 1957 | 9- | 112 | G5 |
| 22 Sep 1957 | 8+ | 104 | G4 |
| 2 Sep 1957 | 8- | 102 | 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
1957 had 118 G1+ storm days (No. 17 of 95 years) and 31 G3+ days.