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Geomagnetic activity in May 1973
Mean Ap16.8No. 259 of 1138
G1+ days9
G3+ days2
Max Ap8014 May 1973
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 1973 | 5- | 17 | G1 |
| 13 May 1973 | 5+ | 20 | G1 |
| 14 May 1973 | 8- | 80 | G4 |
| 15 May 1973 | 5+ | 37 | G1 |
| 16 May 1973 | 6o | 33 | G2 |
| 17 May 1973 | 5- | 26 | G1 |
| 18 May 1973 | 5- | 22 | G1 |
| 21 May 1973 | 7o | 48 | G3 |
| 22 May 1973 | 5o | 21 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1972 | 9.9 | 3 | 1 |
| May 1973 | 16.8 | 9 | 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 16.8 in May 1973, No. 259 of 1138 months since 1932; 9 days reached G1 or higher.