better understanding how fault-friction works, based on inferences from the lab and inferences from the field
Date: December 2, 2025
Location: Online via Zoom
Workshop Organizers: Ruth Harris (USGS), Michael Barall (USGS)
SCEC Award: 25347
Registration Deadline: November 26, 2025
Dynamic rupture simulations are useful tools to help us better understand how earthquakes work and how they generate ground motions. Nowadays dynamic earthquake rupture codes are used by dozens of researchers around the world to increase our knowledge about earthquakes which occurred in the past, and to create scenarios of earthquakes of the future. Dynamic rupture simulations are the sister computations of their more commonly used counterparts, kinematic rupture simulations, but dynamic rupture simulations are more complex and need more assumptions about rock properties and the physics of faulting. Included in these assumptions is fault-friction behavior. In our group’s workshops in the early-2020’s, we learned about each of the four ingredients for dynamic rupture simulations, including a January 2020 fault-friction workshop, but it is clear that we still have much to learn, and in the past 4-5 years there have been even more developments about this topic. In our 2025 workshop we plan to return to the fault-friction theme, to learn about the state of the science and how we should implement it in our simulations.
We welcome individuals involved in dynamic rupture simulations of earthquakes, and from anyone working on coseismic fault friction concepts based on field, laboratory and computational rock mechanics. We especially encourage participation from students, postdocs, and other early career scientists.
All times are Pacific Standard Time (UTC-8).
| Time | Description | Presenter | |
|---|---|---|---|
| 09:00 - 09:20 | Introduction | Ruth Harris | |
| 09:25 - 10:00 | 35-minute Overview Talk, including Q&A | Monica Barbery | |
| 10:05 - 10:20 | 15-minute Talk, including Q&A | Alexis Ault | |
| 10:25 - 10:40 | 15-minute Talk, including Q&A | Eric Burdette | |
| 10:45 - 11:00 | Lightning Talks on New Science Ideas (videos) 1-slide, 100-seconds | ||
| 11:05 - 11:20 | Break | ||
| 11:25 - 11:40 | 15-minute Talk, including Q&A | Jun Young Song | |
| 11:45 - 12:00 | 15-minute Talk, including Q&A | Yuval Tal | |
| 12:05 - 12:20 | 15-minute Talk, including Q&A | Eric Ferre | |
| 12:25 - 13:00 | Break | ||
| 13:05 - 13:20 | 15-minute Talk, including Q&A | Sara Beth Cebry | |
| 13:25 - 13:40 | Evolution of fault strength in granite under hydrothermal conditions | Tamara Jeppson | |
| 13:45 - 14:00 | Group Discussion | All | |
| 14:05 - 14:20 | Lightning Talks on New Science Ideas (videos) 1-slide, 100-seconds | ||
| 14:20 - 14:40 | Break | ||
| Updates from CRESCENT and from SEAS and Stress Drop Validation | |||
| 14:40 - 14:55 | 3D fully coupled earthquake dynamic rupture and tsunami benchmarks with varying bathymetric complexity | Fabian Kutschera | |
| 15:00 - 15:07 | SEAS TAG | TAG leader - Valere Lambert | |
| 15:12 - 15:19 | Stress Drop TAG | TAG leader - Rachel Abercrombie/Annemarie Baltay | |
| 15:24 - 16:00 | Group Discussion: Planning Our Next Steps | All | |
This SCEC-USGS group is an international collaboration that focuses on verifying computer codes used to simulate earthquakes as spontaneous dynamic ruptures. While the ultimate goal is model validation, we are currently using benchmarks to test for consistency of results under the same assumptions.
The Statewide California Earthquake Center (SCEC) fosters a diverse and inclusive community where everyone feels safe, productive, and welcome. We expect all participants in SCEC-supported events to uphold this commitment by adhering to the SCEC Activities Code of Conduct.
The SCEC Annual Meeting brings together 400-500 participants worldwide to share breakthroughs, assess progress, and chart a collaborative path for earthquake science. All of the Center activities are presented, analyzed, and woven into a set of priorities for SCEC to pursue in the future.