Thanks for the info Larry, that's very interesting.

As Tom mentioned Volcanos are pretty prevalent in Washington, but they are in the cascades. Spokane is on the Idaho Washinton border, quite a ways relatively speaking from the volcanos. The epicenter for these earthquakes is downtown Spokane, and only 1 or 2 miles deep.

The drilling you mentioned is unlikely, since Spokane sits on top of an auqifer that is only 600 feet below groundlevel on the valley floor. It "pokes" through pretty easily. The auqifer provides water for the entire area, so no need for deep wells. Protecting the aquifer is a hot topic here, and so it should be. I don't know of any oil wells nearby. The public made a huge outcry (myself included) when Burlington Northern proposed putting a refueling station over the auqifer.

This whole thing is really baffling. The news mentioned last night, that scientists are now coming in to study the seismic events. Maybe they can come up with some answers.

Thanks for the input,

Steve G.