This is a movie showing the earthquake rupture history of the Cascadia Subduction zone for the last 10,000 years based on offshore and onshore paleoseismology. It's based on this paper:
Goldfinger, C., Nelson, C.H., Morey, A., Johnson, J.E., Gutierrez-Pastor, J., Eriksson, A.T., Karabanov, E., Patton, J., Gracia, E., Enkin, R., Dallimore, A., Dunhill, G., and Vallier, T., 2012, Turbidite Event History: Methods and Implications for Holocene Paleoseismicity of the Cascadia Subduction Zone, USGS Professional Paper 1661-F, Reston, VA, U.S. Geological Survey, p. 184 p, 64 Figures.http://pubs.usgs.gov/pp/pp1661f/
For more info on Cascadia earthquakes and paleoseismology of subduction zones, check out: 
http://activetectonics.coas.oregonstate.edu