It’s the largest earthquake recorded in North America and the second largest in the world, next to the M9.5 earthquake in Chile in 1960, adds USGS. In a subduction earthquake, “an ocean plate is being pushed beneath the continent – whether it’s Alaska, Vancouver Island or North America,” he explains. On that fateful day on Vancouver Island, the tsunami waves rushed through the Alberni Inlet onto shore, destroying homes, buildings and vehicles. READ MORE: Tofino crews spring into action to prepare for potential tsunamiWhat’s different about a subduction earthquake? A 2025 earthquake that rumbled in Russia generated tsunami advisories on Vancouver Island, bringing back the memory of 1964 for many.

Source: CBC News March 29, 2026 14:09 UTC