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- S33A-08: Can the Complex Dynamic Rupture Behaviour of the 2025 Myanmar Earthquake be Predicted from its Static Slip Distribution Alone?
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NOLA CC
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Alice-Agnes Gabriel, Scripps Institution of Oceanography (First Author, Presenting Author)
Thomas Ulrich, Ludwig-Maximilians-Universität München
Xiaoyu Zou, Scripps Institution of Oceanography, University of California, San Diego
Nico Schliwa, Ludwig Maximilians University of Munich
Mathilde Marchandon, Université Côte d’Azur, CNRS, OCA, IRD, Géoazur
Fengzhou Tan, Geological Survey of Canada Sidney
Wenyuan Fan, Scripps Institution of Oceanography
Peter Shearer, Univ California San Diego
Yuri Fialko, Scripps Institution of Oceanography, University of California, San Diego
The 2025 Myanmar earthquake produced one of the longest ruptures ever recorded on a strike-slip fault, impacting a densely populated region with vulnerable infrastructure. To better understand this earthquake, we combined satellite and seismic data with advanced computer simulations to explore how the earthquake started and spread along the fault. Our models show that the earthquake quickly accelerated to very high speeds deep underground (called 'supershear'), while near the surface, the rupture moved slower. This variation helped explain the unusual shaking patterns observed by seismic stations and cameras. We also found that the fault zone's rocks likely contained clays and fluids, making the fault weaker and easier to rupture. Our study demonstrates that advanced simulations, guided by real-world observations, can rapidly and reliably help us understand complex earthquakes and better prepare for similar events elsewhere.
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