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  • Presentation | S33B: Advancing Theoretical and Computational Seismology III Poster
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  • S33B-0249: Tandem - A 2D/3D HPC-Enabled Volumetric Software for Sequences of Earthquakes and Aseismic Slip (SEAS) Across Complex Fault Systems
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  • Board 0249‚ Hall EFG (Poster Hall)
    NOLA CC
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Author(s):
Jeena Yun, Scripps Institution of Oceanography, University of California San Diego (First Author, Presenting Author)
Dave May, Scripps Institution of Oceanography, University of California San Diego
Piyush Karki, Technical University of Munich
Yohai Magen, Scripps Institution of Oceanography, University of California San Diego
Bar Oryan, Scripps Institution of Oceanography, University of California San Diego
Thomas Ulrich, Ludwig-Maximilians-Universität München
Alice-Agnes Gabriel, Ludwig-Maximilians-Universität München


Earthquakes occur along faults, and these faults often behave in complex ways, slipping quietly or rupturing dramatically. To understand such behavior, scientists rely on simulations that replicate earthquake cycles, including both slow and fast slip events. We developed Tandem, a powerful open-source software tool that uses high-performance computing to efficiently simulate these earthquake cycles in realistic fault systems. Tandem accurately models how faults slip and interact, accommodating complex shapes such as curved fault lines and detailed land surface features. Using advanced computational methods, Tandem helps researchers rapidly explore many possible earthquake scenarios. Ongoing developments, such as including the Earth's gradual deformation over time (viscoelasticity), continually enhance its capabilities. Tandem is part of community efforts to verify earthquake modeling techniques and supports the development of simplified, yet highly accurate, models for understanding earthquake behavior. Annual training sessions and collaborative events ensure Tandem remains accessible and beneficial to researchers worldwide, facilitating improved earthquake preparedness and hazard assessment.



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