After some research (of course on my Google Android phone), I learned that the Juan De Fuca Plate subducted under the North American Plate, raising it up, causing the earthquake. This region usually has deep earthquakes. There are also the Cascade Mountain Ranges and Mt. St. Helens.
http://www.dnr.wa.gov/SiteCollectionImages/Places/ger_nis_quake01.jpg
Also, a little bit afterwards I went out into the ocean and looked for the boundary lines. I was surprised to see that this was a transform tectonic boundary line as well as a subduction. WOW!!!!
Location of the transform boundary line + trench: 43°46'31.56"N 128°37'47.58"W
Also, a little bit afterwards I went out into the ocean and looked for the boundary lines. I was surprised to see that this was a transform tectonic boundary line as well as a subduction. WOW!!!!
Location of the transform boundary line + trench: 43°46'31.56"N 128°37'47.58"W
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