Is the earthquake hazard...

in western Washington underestimated: Earthquake Fault Much Larger, More Dangerous than Thought? Main thrust (pardon the pun) of the article:

"An earthquake fault previously believed to be limited to an area south of Washington state's Whidbey Island actually stretches 250 to 300 miles, from Victoria, B.C., to Yakima, Wash., crossing the Cascade Mountains and capable of producing a major earthquake, new research shows."