Finder Templates for the Pacific Northwest

Date: 4/25/2019

Time: 04:15 PM

Room: Puget Sound

FinDer (Böse et al., 2018) is an earthquake early warning (EEW) algorithm that quickly determines the length scale of a rupture by comparing the spatial pattern of observed peak ground accelerations to pre-computed spatial templates. FinDer is one of the algorithms that contributes alerts to the West Coast wide USGS ShakeAlert system (Given et al., 2018), however, that implementation currently only has a set of templates appropriate for modeling shallow crustal events. In the Pacific Northwest, in addition to hazard from shallow crustal faults, there is also significant hazard due to subduction zone interface and intraslab earthquakes. We computed a new set of FinDer templates for interface and intraslab events using several Ground Motion Models and the Slab 2.0 (Hayes, 2018) model for the Cascadia Subduction Zone. We compare the templates to spatial acceleration patterns from both simulated and observed seismic data to assess their applicability.

Presenting Author: Renate Hartog

Authors