Hall of storms · #4 / 10
The Quebec blackout storm
March 13–14, 1989
Peak Kp
Kp 9.0
G5 — top storm class
Peak moment
21:00 UTC
March 13, 1989
Duration
2 days
March 13–14, 1989
At the ceiling
9.0 ×2
2 intervals at Kp 9.0
What it reached
North America — Hydro-Québec's grid collapsed in 90 seconds, six million in the dark; aurora to Florida and Cuba
Open in the archive
March 1989 — the three-hourly Kp values, day by day