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Room: Key Ballroom 11

Date: 4/16/2025

Session Time: 10:30 AM to 11:45 AM (local time)

Recent Advances in Modeling Near-source Ground Motions for Seismic Hazard Applications

In recent years, modeling efforts that characterize the earthquake source in greater detail have enabled a better understanding of earthquake behavior and resulting broadband ground motion. For example, modeling the geometry of fault surfaces and propagation of rupture has helped map source properties into ground motion amplification patterns and variability. This improved accuracy from modeling finite-fault effects can be influential in studies investigating predictions of earthquake ground motions and other downstream efforts involving seismic hazard assessment. Here, we invite studies that model earthquake source processes targeting improved ground shaking via either empirical or simulation-based approaches. Example topics of interest include observations of azimuthally varying ground motion, rupture directivity from both small and large events, polarization of ground motion records, complex source modeling using kinematic or dynamic ruptures, and near-source efforts that study median and ground motion variability terms, isolated in terms of either intra- or inter-event standard deviation. Studies using machine learning methods, utilizing both empirical and synthetic datasets are welcomed as well.

Conveners 

Jeff Bayless, AECOM (jeff.bayless@aecom.com)
Nick Gregor, Consultant (nick@ngregor.com)
Evan Hirakawa, U.S. Geological Survey (ehirakawa@usgs.gov)
Grace Parker, U.S. Geological Survey (gparker@usgs.gov)
Badie Rowshandel, California Earthquake Authority (browshandel@calquake.com)
Kyle B. Withers, U.S. Geological Survey (kwithers@usgs.gov)

Oral Presentations