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Geomagnetic activity in October 1973
Mean Ap18.4No. 194 of 1138
G1+ days13
G3+ days2
Max Ap8629 Oct 1973
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Oct 1973 | 5o | 31 | G1 |
| 3 Oct 1973 | 7+ | 48 | G3 |
| 10 Oct 1973 | 5o | 21 | G1 |
| 12 Oct 1973 | 5- | 15 | G1 |
| 16 Oct 1973 | 5+ | 30 | G1 |
| 17 Oct 1973 | 5- | 27 | G1 |
| 18 Oct 1973 | 5o | 22 | G1 |
| 21 Oct 1973 | 5+ | 37 | G1 |
| 22 Oct 1973 | 5- | 20 | G1 |
| 28 Oct 1973 | 5o | 20 | G1 |
| 29 Oct 1973 | 7o | 86 | G3 |
| 30 Oct 1973 | 6- | 28 | G2 |
| 31 Oct 1973 | 5o | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1972 | 12.2 | 6 | 1 |
| October 1973 | 18.4 | 13 | 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 18.4 in October 1973, No. 194 of 1138 months since 1932; 13 days reached G1 or higher.