Skip to content
Hall of storms · #8 / 10

September 18–19, 1941

Peak Kp
Kp 9.0
G5 — top storm class
Peak moment
03:00 UTC
September 19, 1941
Duration
2 days
September 18–19, 1941
At the ceiling
9.0 ×1
1 intervals at Kp 9.0
What it reached

North America & Europe — aurora over wartime blackouts

Open in the archive
September 1941 — the three-hourly Kp values, day by day
← #7 · July 13–14, 1982#9 · July 15, 1959