10,000 Years

There have been 46 magnitude 8 and 9 CSZ earthquakes on the CSZ over the past 10,269 years. Here are the earthquake names, ages, dates, magnitudes, and rupture lengths and widths. Segments are also listed. For more information about segments, click here.

Magnitudes for T6b (8.13) & T19 (8.92) are my estimates based on averages. Here are the calculations.

If I am able to get more info on Segment E, I’ll update this page. As always, if you find an error or have questions, please let me know. I strive to make this as complete and accurate as possible.

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Megathrust Earthquakes	Tsunamis	How Big Will it Be?
How Big is The Fault?	CSZ Frequency	10,000 Years
When Will it Happen?	37% in 50 Years	17% in 50 Years
Summer Earthquakes	The True Risk	Worst Case Scenario
Expected Regional Impacts	Why Prepare	Drop, Cover, Hold?
Water Preparedness	Food Preparedness	Sanitation… & Whales
Life Without Electricity	Slow-Slip Events (ETS)	Offshore Earthquakes
Resources	CERT Salem	West Salem CERT
Research Papers	Book Recommendations	Contact

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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/ 

Goldfinger, C., Galer, S., Beeson, J.W., Hamilton, T.S, Black, B., Romsos, C., Patton, J., Nelson, C.H., Hausmann, R., Morey,A., 2017, The Importance of Site Selection, Sediment Supply, and Hydrodynamics: A Case Study of Submarine Paleoseismology on the Northern Cascadia margin, Washington USA, Marine Geology, v. 384, p. 4-46.