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Geomagnetic activity in October 1974
Mean Ap25.5No. 54 of 1138
G1+ days17
G3+ days2
Max Ap8613 Oct 1974
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Oct 1974 | 5o | 28 | G1 |
| 2 Oct 1974 | 6o | 30 | G2 |
| 6 Oct 1974 | 5- | 11 | G1 |
| 9 Oct 1974 | 6- | 39 | G2 |
| 12 Oct 1974 | 5- | 17 | G1 |
| 13 Oct 1974 | 7o | 86 | G3 |
| 14 Oct 1974 | 6o | 30 | G2 |
| 15 Oct 1974 | 6o | 50 | G2 |
| 16 Oct 1974 | 7o | 68 | G3 |
| 17 Oct 1974 | 6o | 47 | G2 |
| 18 Oct 1974 | 6- | 43 | G2 |
| 19 Oct 1974 | 5- | 29 | G1 |
| 20 Oct 1974 | 6- | 41 | G2 |
| 24 Oct 1974 | 6+ | 38 | G2 |
| 26 Oct 1974 | 5o | 28 | G1 |
| 27 Oct 1974 | 5+ | 25 | G1 |
| 28 Oct 1974 | 5+ | 29 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1973 | 18.4 | 13 | 2 |
| October 1974 | 25.5 | 17 | 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 25.5 in October 1974, No. 54 of 1138 months since 1932; 17 days reached G1 or higher.