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Geomagnetic activity in April 1972
Mean Ap10.9No. 676 of 1138
G1+ days7
G3+ days0
Max Ap4229 Apr 1972
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 1972 | 5o | 17 | G1 |
| 2 Apr 1972 | 5o | 11 | G1 |
| 18 Apr 1972 | 5- | 24 | G1 |
| 21 Apr 1972 | 5- | 19 | G1 |
| 28 Apr 1972 | 5+ | 22 | G1 |
| 29 Apr 1972 | 6- | 42 | G2 |
| 30 Apr 1972 | 5o | 17 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1971 | 15.0 | 10 | 2 |
| April 1972 | 10.9 | 7 | 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 10.9 in April 1972, No. 676 of 1138 months since 1932; 7 days reached G1 or higher.