Probabilistic Source Selection for the Cascadia Subduction Zone

Results from a study supported by FEMA Region IX, March, 2017

Loyce M. Adams, Randall J. LeVeque, Donsub Rim, and Frank I. Gonzalez, University of Washington

Figures showing all realizations and clusters

• All realizations Showing the slip on the fault plane, the resulting sea floor deformation, and the maximum flow depth observed over the Crescent City study region (as computed on a 2/3 arcsecond grid using GeoClaw.

• etamean-etamax clustering of events Showing only the maximum flow depth plots, clustered using k-means clustering in the etamean-etamax plane, based on the coarse grid (10 arcsecond) simulations. [Plot of clusters]

• dtopo clustering of events Showing only the maximum flow depth plots, clustered using k-means clustering in the variables dzCC (subsidence at Crescent City) vs. maximum sea floor deformation offshore. This clustering can be done based only on the sea floor deformations (dtopo files) without any GeoClaw simulations. [Plot of clusters]