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SCEC Workshop on Advancing Simulations of Sequences of Earthquakes and Aseismic Slip

Conveners: Brittany Erickson (U of Oregon), Junle Jiang (Oklahoma), Valere Lambert (UCSC)
Dates: November 2, 2021 (online)
SCEC Award: 21139

SUMMARY: Our group ​is working to advance ​computational methods for simulating Sequences of Earthquakes and Aseismic Slip (SEAS) by conducting a suite of code verification exercises. ​In SEAS models, the goal is to capture the interplay of aseismic fault slip—that ultimately lead to earthquake nucleation—and dynamic earthquake ruptures themselves, in an effort to understand which physical factors control the full range of observables such as aseismic deformation, earthquake initiation locations, ground shaking during dynamic rupture, recurrence times and magnitudes of earthquakes.

The goal of this workshop is to share some recent progress in SEAS modeling that considers fluid effects and increased frictional and geometric complexity and to introduce our next benchmark problems BP6 and BP7, which focus on fluid and 3D effects, respectively. We will summarize results from the most recent benchmarks BP3-QD, BP1-FD, and BP5 which focused on dipping fault geometries, full dynamic and 3D effects, respectively. We will also discuss research targets and plans for SEAS in the near and longer term for the group.

All times below are Pacific Daylight Time (PDT or UTC-7).

08:00 - 08:50 Session 1: Workshop Goals, Introductions, Results to Date  
08:00 - 08:10 Workshop Goals and Science Targets  
08:10 - 08:30 Group Introductions  
08:30 - 08:50 Review of SEAS Group Benchmark Results  
08:50 -09:00 Break  
09:00 - 10:00 Session 2: Fluid Effects and Friction  
09:00 - 09:20 TBD  
09:20 - 09:40 Fault Slip Coupled to Fluid Migration with Porosity and Permeability Evolution  
09:40 - 10:00 Fault Dynamics in Non-Isothermal Conditions  
10:00 - 10:10 Break  
10:10 - 11:00 Session 3: Complex Geometries and Physics  
10:10 - 10:30 Fully-Dynamic Earthquake Cycle on a Non-Planar Fault Using the Spectral Boundary Element Method  
10:30 - 10:50 Simulations on realistic megathrust geometries  
10:50 - 11:00 Group Discussion  
11:00 - 12:00 Break  
12:00 - 13:00 Session 4: New Benchmarks  
12:00 - 12:20 New Benchmarks BP6 and 7  
12:20 - 13:00 Group Discussion  
13:00 - 14:00 Session 5: Future Directions for SEAS  
13:00 - 13:30 Group Planning for 2022  
13:30 - 14:00 Group Discussion: Recommendations for Future Research Beyond 2022  
14:00 Adjourn  

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