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Geomagnetic activity in May 1984
Mean Ap16.8No. 257 of 1138
G1+ days12
G3+ days0
Max Ap4421 May 1984
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 May 1984 | 6- | 27 | G2 |
| 9 May 1984 | 5o | 19 | G1 |
| 10 May 1984 | 5+ | 27 | G1 |
| 17 May 1984 | 6o | 32 | G2 |
| 18 May 1984 | 5- | 12 | G1 |
| 19 May 1984 | 5o | 22 | G1 |
| 20 May 1984 | 5o | 30 | G1 |
| 21 May 1984 | 6o | 44 | G2 |
| 22 May 1984 | 5+ | 32 | G1 |
| 23 May 1984 | 6- | 30 | G2 |
| 24 May 1984 | 5+ | 30 | G1 |
| 25 May 1984 | 5- | 16 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1983 | 22.1 | 14 | 2 |
| May 1984 | 16.8 | 12 | 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 16.8 in May 1984, No. 257 of 1138 months since 1932; 12 days reached G1 or higher.