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Geomagnetic activity in May 1948
Mean Ap18.8No. 184 of 1138
G1+ days12
G3+ days1
Max Ap7216 May 1948
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 May 1948 | 5o | 24 | G1 |
| 7 May 1948 | 6o | 35 | G2 |
| 9 May 1948 | 6+ | 32 | G2 |
| 10 May 1948 | 5o | 18 | G1 |
| 13 May 1948 | 5o | 17 | G1 |
| 15 May 1948 | 6+ | 47 | G2 |
| 16 May 1948 | 7o | 72 | G3 |
| 21 May 1948 | 6+ | 45 | G2 |
| 22 May 1948 | 5o | 28 | G1 |
| 23 May 1948 | 5- | 17 | G1 |
| 24 May 1948 | 5- | 16 | G1 |
| 29 May 1948 | 5+ | 27 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1947 | 14.0 | 8 | 1 |
| May 1948 | 18.8 | 12 | 1 |
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 18.8 in May 1948, No. 184 of 1138 months since 1932; 12 days reached G1 or higher.