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Geomagnetic activity in October 1955
Mean Ap11.3No. 642 of 1138
G1+ days4
G3+ days0
Max Ap5625 Oct 1955
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 Oct 1955 | 6- | 23 | G2 |
| 25 Oct 1955 | 6o | 56 | G2 |
| 26 Oct 1955 | 6- | 38 | G2 |
| 31 Oct 1955 | 5+ | 26 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1954 | 14.8 | 11 | 0 |
| October 1955 | 11.3 | 4 | 0 |
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.
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Mean Ap 11.3 in October 1955, No. 642 of 1138 months since 1932; 4 days reached G1 or higher.