Hall of storms · #5 / 10
The Easter Sunday storm
March 24–25, 1940
Peak Kp
Kp 9.0
G5 — top storm class
Peak moment
15:00 UTC
March 24, 1940
Duration
2 days
March 24–25, 1940
At the ceiling
9.0 ×2
2 intervals at Kp 9.0
What it reached
North America — telegraph and power disturbances across the US
Open in the archive
March 1940 — the three-hourly Kp values, day by day