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Great Subduction Zone earthquakes are the largest earthquakes in the world, and can exceed magnitude 9.0. Earthquake size is porportional to fault area, and the Cascadia Subduction Zone is a very long sloping fault that stretches from mid-Vancouver Island to Northern California. It separates the Juan de Fuca and North America plates. Because of the very large fault area, the Cascadia Subduction Zone could produce a very large earthquake, magnitude 9.0 or greater, if rupture occurred over its whole area.
Originally posted by dgtempe
I hadnt seen this, but i am predicting a huge event in the Oregon, Washington state area for Tuesday the 16th.
That date has been on my mind for a long time.
Originally posted by lostinspace
A number of my co-workers and I have been watching the USGS map of earthquakes since the massive Chili earthquake. We've been on edge since the number of quakes have been on the rise worldwide. Before I left work today I did not noticed these two quakes off the Oregon coast. We're going to have a bit to talk about when they see these two quakes on the map tomorrow. I wonder if we will be seeing more quakes along this Juan De Fuca plate.