WITHDRAWN A Numerical Model of the Earthquake Cycle Along the Gofar Oceanic Transform Fault
Description:
WITHDRAWN The Gofar oceanic transform fault at the East Pacific Rise has the best seismic cycle recorded by modern instruments. The timing, location, and magnitude of major earthquakes (M>5) have been well constrained by global seismic network. The earthquake interval is short, about 3-5 years, and several segments have already experienced five cycles since 1995, when the seismic network is good enough for surface wave relocation. Two ocean bottom seismometer deployments (2008-2009, 2021-2023) also provided constraints on the seismic property of the fault. These make Gofar an ideal place to study earthquake cycles. Here, we built a numerical model for the seismic cycle along the Gofar transform fault using a semi-analytical approach for rapidly calculating 3D time-dependent deformation and stress caused by screw dislocations imbedded within an elastic layer overlying a Maxwell viscoelastic half-space. The results show that most segments on Gofar have an average Coulomb stress threshold of a few MPa, and the model can forecast future events. Our model also predicts different surface deformation for different viscosity, which will help plan future seafloor geodesy fieldwork at the site.
Session: Numerical Modeling in Seismology: Developments and Applications [Poster Session]
Type: Poster
Date: 5/1/2024
Presentation Time: 08:00 AM (local time)
Presenting Author: Meng (Matt)
Student Presenter: No
Invited Presentation:
Authors
Meng (Matt) Wei Presenting Author Corresponding Author matt-wei@uri.edu University of Rhode Island |
Lingchao He helingchao@uri.edu University of Rhode Island |
Bridget Smith-Konter brkonter@hawaii.edu University of Hawaii at Manoa |
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WITHDRAWN A Numerical Model of the Earthquake Cycle Along the Gofar Oceanic Transform Fault
Category
Numerical Modeling in Seismology: Developments and Applications