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Geomagnetic activity in October 1947
Mean Ap23.1No. 91 of 1138
G1+ days14
G3+ days2
Max Ap612 Oct 1947
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Oct 1947 | 6- | 38 | G2 |
| 2 Oct 1947 | 7- | 61 | G3 |
| 3 Oct 1947 | 7- | 45 | G3 |
| 7 Oct 1947 | 5- | 17 | G1 |
| 9 Oct 1947 | 6o | 50 | G2 |
| 10 Oct 1947 | 6- | 60 | G2 |
| 11 Oct 1947 | 6- | 44 | G2 |
| 12 Oct 1947 | 6o | 47 | G2 |
| 13 Oct 1947 | 5- | 28 | G1 |
| 14 Oct 1947 | 6o | 45 | G2 |
| 15 Oct 1947 | 6o | 47 | G2 |
| 16 Oct 1947 | 5o | 23 | G1 |
| 19 Oct 1947 | 6+ | 29 | G2 |
| 20 Oct 1947 | 5- | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1946 | 13.1 | 5 | 1 |
| October 1947 | 23.1 | 14 | 2 |
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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About this page
Mean Ap 23.1 in October 1947, No. 91 of 1138 months since 1932; 14 days reached G1 or higher.