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Geomagnetic activity in September 1970
Mean Ap10.8No. 682 of 1138
G1+ days5
G3+ days0
Max Ap2413 Sep 1970
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Sep 1970 | 5o | 23 | G1 |
| 2 Sep 1970 | 5o | 18 | G1 |
| 13 Sep 1970 | 5- | 24 | G1 |
| 19 Sep 1970 | 5- | 18 | G1 |
| 21 Sep 1970 | 5- | 23 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1969 | 15.0 | 8 | 3 |
| September 1970 | 10.8 | 5 | 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.
About this page
Mean Ap 10.8 in September 1970, No. 682 of 1138 months since 1932; 5 days reached G1 or higher.