Predicting Ground Motion for Hypothetical Earthquakes in the Cascadia Region Using Virtual Earthquakes

Date: 4/24/2019

Time: 06:00 PM

Room: Grand Ballroom

Predicting the ground motion levels of the next Cascadia earthquakes are critical to mitigating seismic hazard in the Pacific Northwest. Here, we use the continuous recordings of both on shore and off shore seismometers in the Pacific Northwest, including the ones from the Cascadia Initiative Experiment, toward predicting ground motions of M8-M9 earthquakes with kinematic source models and following Denolle et al. (2014). We first characterize the Green’s function content from offshore to onshore paths, we then explore the possibility to extend the previous method to a higher frequency range (up to ~1 Hz) while keeping the relative amplitude information among stations robust. Finally we convolve the 3D Green’s functions with kinematic source models to predict ground motions in the broad region of Oregon and Washington areas.

Presenting Author: Zhitu Ma

Authors