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Geomagnetic activity in July 1981
Mean Ap19.1No. 176 of 1138
G1+ days8
G3+ days2
Max Ap13425 Jul 1981
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jul 1981 | 5- | 22 | G1 |
| 17 Jul 1981 | 6o | 29 | G2 |
| 22 Jul 1981 | 5- | 24 | G1 |
| 23 Jul 1981 | 6- | 37 | G2 |
| 24 Jul 1981 | 5- | 13 | G1 |
| 25 Jul 1981 | 8+ | 134 | G4 |
| 26 Jul 1981 | 8o | 78 | G4 |
| 27 Jul 1981 | 5o | 24 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 1980 | 11.0 | 4 | 2 |
| July 1981 | 19.1 | 8 | 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.
About this page
Mean Ap 19.1 in July 1981, No. 176 of 1138 months since 1932; 8 days reached G1 or higher.