The Great Québec Blackout was caused by double tap CMEs -- Science & Technology -- Sott.net
Sat, 13 Mar 2021 12:00 UTC Sunspot 5395, source of the March 1989 solar storm. From “A 21st Century View of the March 1989 Magnetic Storm” by D. Boteler. They call it "the day the sun brought darkness." On March 13, 1989, a powerful coronal mass ejection (CME) hit Earth's magnetic field. Ninety seconds later, the Hydro-Québec power grid failed. During the 9 hour blackout that followed, millions of Quebecois found themselves with no light or heat, wondering what was going on? "It was the biggest geomagnetic storm of the Space Age," says Dr. David Boteler, head of the Space Weather Group...