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Data-Driven Synthesis of Broadband Earthquake Ground Motions Using Artificial Intelligence

Florez, Manuel A. and Caporale, Michaelangelo and Buabthong, Pakpoom and Ross, Zachary E. and Asimaki, Domniki and Meier, Men-Andrin (2022) Data-Driven Synthesis of Broadband Earthquake Ground Motions Using Artificial Intelligence. Bulletin of the Seismological Society of America, 112 (4). pp. 1979-1996. ISSN 0037-1106. doi:10.1785/0120210264. https://resolver.caltech.edu/CaltechAUTHORS:20220823-628154700

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Abstract

Robust estimation of ground motions generated by scenario earthquakes is critical for many engineering applications. We leverage recent advances in generative adversarial networks (GANs) to develop a new framework for synthesizing earthquake acceleration time histories. Our approach extends the Wasserstein GAN formulation to allow for the generation of ground motions conditioned on a set of continuous physical variables. Our model is trained to approximate the intrinsic probability distribution of a massive set of strong-motion recordings from Japan. We show that the trained generator model can synthesize realistic three-component accelerograms conditioned on magnitude, distance, and V_(S30). Our model captures most of the relevant statistical features of the acceleration spectra and waveform envelopes. The output seismograms display clear P- and S-wave arrivals with the appropriate energy content and relative onset timing. The synthesized peak ground acceleration estimates are also consistent with observations. We develop a set of metrics that allow us to assess the training process’s stability and to tune model hyperparameters. We further show that the trained generator network can interpolate to conditions in which no earthquake ground-motion recordings exist. Our approach allows for the on-demand synthesis of accelerograms for engineering purposes.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1785/0120210264DOIArticle
ORCID:
AuthorORCID
Florez, Manuel A.0000-0003-1034-2082
Buabthong, Pakpoom0000-0001-5538-138X
Ross, Zachary E.0000-0002-6343-8400
Asimaki, Domniki0000-0002-3008-8088
Meier, Men-Andrin0000-0002-2949-8602
Additional Information:This research was partially supported by the U.S. Geological Survey/National Earthquake Hazards Reduction Program (USGS/NEHRP) Grant G19AP00035 and by the Southern California Earthquake Center (SCEC). SCEC is funded by the National Science Foundation (NSF) Cooperative Agreement EAR‐1600087 and USGS Cooperative Agreement G17AC00047. The authors would like to thank Egill Hauksson for helpful discussions. The authors also would like to thank Fabrice Cotton and Mostafa Mousavi for their comments and suggestions.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
USGSG19AP00035
Southern California Earthquake Center (SCEC)UNSPECIFIED
NSFEAR‐1600087
USGSG17AC00047
Issue or Number:4
DOI:10.1785/0120210264
Record Number:CaltechAUTHORS:20220823-628154700
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20220823-628154700
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116432
Collection:CaltechAUTHORS
Deposited By: Melissa Ray
Deposited On:30 Aug 2022 01:26
Last Modified:30 Aug 2022 01:26

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