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Geomagnetic activity in April 2001
Mean Ap22.1No. 106 of 1138
G1+ days12
G3+ days5
Max Ap8511 Apr 2001
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 2001 | 6- | 38 | G2 |
| 2 Apr 2001 | 5- | 22 | G1 |
| 4 Apr 2001 | 5+ | 23 | G1 |
| 7 Apr 2001 | 5- | 20 | G1 |
| 8 Apr 2001 | 7o | 63 | G3 |
| 9 Apr 2001 | 5o | 20 | G1 |
| 11 Apr 2001 | 8+ | 85 | G4 |
| 12 Apr 2001 | 7+ | 50 | G3 |
| 13 Apr 2001 | 7+ | 50 | G3 |
| 18 Apr 2001 | 7+ | 50 | G3 |
| 22 Apr 2001 | 6+ | 37 | G2 |
| 28 Apr 2001 | 6o | 40 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 2000 | 15.5 | 5 | 2 |
| April 2001 | 22.1 | 12 | 5 |
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 22.1 in April 2001, No. 106 of 1138 months since 1932; 12 days reached G1 or higher.