I believe you.....that's what the last quake here was like....a lotta banging and shaking!
The last quake there actually was the subduction zone, but it's very deep when it's right under Seattle.
The Seattle Fault is right at the surface. An earthquake on it of equal magnitude to the 2001 Nisqually earthquake would make the Nisqually quake look like a joke.
http://seattletimes.nwsource.com/html/localnews/2002185299_earthquake20m.html