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Geomagnetic activity in May 1955
Mean Ap11.5No. 628 of 1138
G1+ days8
G3+ days1
Max Ap3926 May 1955
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 May 1955 | 6o | 32 | G2 |
| 7 May 1955 | 5- | 25 | G1 |
| 8 May 1955 | 5+ | 32 | G1 |
| 16 May 1955 | 5+ | 14 | G1 |
| 25 May 1955 | 7- | 34 | G3 |
| 26 May 1955 | 6+ | 39 | G2 |
| 27 May 1955 | 5o | 21 | G1 |
| 28 May 1955 | 5- | 23 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1954 | 7.4 | 0 | 0 |
| May 1955 | 11.5 | 8 | 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 11.5 in May 1955, No. 628 of 1138 months since 1932; 8 days reached G1 or higher.