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Geomagnetic activity in May 2001
Mean Ap10.2No. 729 of 1138
G1+ days4
G3+ days0
Max Ap399 May 2001
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 May 2001 | 5+ | 39 | G1 |
| 10 May 2001 | 5+ | 23 | G1 |
| 12 May 2001 | 5+ | 30 | G1 |
| 13 May 2001 | 5+ | 27 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 2000 | 15.2 | 7 | 2 |
| May 2001 | 10.2 | 4 | 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 10.2 in May 2001, No. 729 of 1138 months since 1932; 4 days reached G1 or higher.