[hennie pennie]

9.0 ?

Oh my.... I suppose it will not surprise you that I have never ever heard of a NINE earthquake, I had no idea that such a magnitude even existed.

That is absolutely frightening, but it is VERY interesting to me that perhaps there have been major cataclysms in the area, say in the 1500s, 1600s, early 1700s -- well before settlement in the area.

Is there anything in the Lewis & Clarke journals which may substantiate the recent geologic record?

[muawiyah]

You just go there and look at it. Volcano looming over everything, lahars, rocks hither and yon, looks like it just happened.

[Godzilla]

Here is a link that explains the evidence and the history, enjoy

http://www.pnsn.org/HAZARDS/CASCADIA/cascadia_event.html

[nw_arizona_granny]

Oh my.... I suppose it will not surprise you that I have never ever heard of a NINE earthquake, I had no idea that such a magnitude even existed.<<<<

http://www.google.com/search?q=9+earthquake&btnG=Search&hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&hs=05p&sa=2

FEMA: Solving the Mystery of the Magnitude 9 Earthquake
Jun 4, 2009 ... So how do we know that a magnitude 9 earthquake occurred in the Seattle area on January 26, 1700? Amazingly, the remains of dead, ...
www.fema.gov/plan/prevent/earthquake/sty_mag9.shtm

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Has several 9 power earthquakes showing:

http://www.google.com/search?q=9+on+the+Richter+Scale&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a