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Geomagnetic activity in April 1951
Mean Ap27.2No. 41 of 1138
G1+ days20
G3+ days1
Max Ap6618 Apr 1951
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Apr 1951 | 5o | 31 | G1 |
| 3 Apr 1951 | 6o | 51 | G2 |
| 4 Apr 1951 | 6o | 46 | G2 |
| 5 Apr 1951 | 6+ | 49 | G2 |
| 6 Apr 1951 | 6o | 48 | G2 |
| 7 Apr 1951 | 6- | 35 | G2 |
| 8 Apr 1951 | 5- | 25 | G1 |
| 10 Apr 1951 | 5o | 21 | G1 |
| 12 Apr 1951 | 5+ | 19 | G1 |
| 13 Apr 1951 | 6o | 44 | G2 |
| 14 Apr 1951 | 5- | 20 | G1 |
| 18 Apr 1951 | 8- | 66 | G4 |
| 19 Apr 1951 | 5o | 17 | G1 |
| 20 Apr 1951 | 6+ | 41 | G2 |
| 21 Apr 1951 | 6- | 40 | G2 |
| 22 Apr 1951 | 5+ | 42 | G1 |
| 23 Apr 1951 | 5o | 16 | G1 |
| 24 Apr 1951 | 6o | 41 | G2 |
| 25 Apr 1951 | 6- | 43 | G2 |
| 26 Apr 1951 | 6- | 14 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1950 | 18.3 | 12 | 1 |
| April 1951 | 27.2 | 20 | 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 27.2 in April 1951, No. 41 of 1138 months since 1932; 20 days reached G1 or higher.