Stan G Webb In Retirement© Introduction
My second earthquake was Canada's biggest in recorded history.
Haida Gwaii (Queen Charlotte Islands) earthquake struck the sparsely populated Queen Charlotte Islands and the Pacific Northwest coast at 8:01 p.m. PDT on August 21, 1949. The shock had a surface wave magnitude of 8.1 and a maximum Mercalli Intensity of VIII (Severe). I had just turn five years old and that one shook my being, to the depth of my soul.
There were bigger ones, of course. The Cascadia earthquake occurred along the Cascadia subduction zone on January 26, 1700 with an estimated moment magnitude of 8.7–9.2. The megathrust 'subduction zone' earthquakes involved the Juan de Fuca Plate from mid-Vancouver Island, south along the Pacific Northwest coast as far as northern California.
Most everyone knows that I think that the way everyone is looking at Cascadia is all upside down and backwards. Everybody.
New Cascadia Dawn© - Cascadia Megaquake M9.0+ - Cascadia Rising, An Intelligent Man's Guide© https://cascadiamegaquake.blogspot.com/, Cascadia Volcanoes© https://cascadiavolcanoes.blogspot.com/
Lead Author: Stan G. Webb - In Retirement© https://stangwebb.blogspot.com/