Integrating friction into the Community Rheology Model
Date: September 6, 2025
Location: Palm Springs Hilton
Workshop Organizers: Alexis Ault (Utah State), Sylvain Barbot (USC), Caroline Seyler (USC)
SCEC Award: 25133
APPLICATION DUE: July 31, 2025
Attendance is limited to 30 in-person participants. The accepted participant list will be finalized by August 8, 2025.
The Community Rheology Model (CRM) is a foundational Community Earth Model (CEM) but, to date, is underdeveloped because it does not include brittle rheology. On- and off-fault frictional properties within and above the seismogenic zone are critical components of quasi-static and dynamic rupture simulations and probabilistic earthquake hazard forecasts for the state of California. In this pre-SCEC Annual Meeting Workshop we aim to take an important step in filling this critical data gap by creating a FAIR compliant database or repository for georeferenced frictional properties over a range of conditions (e.g., lithology (on- and off-fault, host rock), depth, temperature, fluid conditions, fabric) from across California nested within the CEM framework.
We will bring together stakeholders from the experimental/rock mechanics, earthquake geology, geophysics, and computational communities including the next generation of SCEC researchers to (1) design a new frictional database, (2) pinpoint persistent unknowns in the context of the statewide mission that advance the CRM, and (3) strategize and advocate for the CRM, the importance of rheology in future SCEC science, and the intersectionality of SCEC and CRESCENT through rheology-based toolboxes and science.
We welcome applications from individuals involved in experimental/rock mechanics, earthquake geology, geophysics, and computational communities. We especially encourage participation from students, postdocs, and early career scientists. Capacity is limited to 30 in-person participants, selected based on their statement of interest and the potential of their contributions.
All times are Pacific Daylight Time (UTC-7).
Time | Agenda Item | Speaker | |
---|---|---|---|
09:00 - 10:00 | Coffee, breakfast, check-in | ||
10:00 - 10:15 | Welcome and workshop goals | Alexis Ault, Sylvain Barbot, Caroline Seyler | |
10:15 - 10:30 | State of the CRM and CEM interface | Laurent Montesi | |
Session 1: Building a Frictional Database for California Moderator: Caroline Seyler | |||
10:30 - 10:35 | Introduction | Caroline Seyler | |
10:35 - 10:55 | Science Talk: Impact of heterogeneity on fault friction/healing | Srisharan Shreedharan | |
10:55 - 11:15 | Science Talk: Microphysical controls on frictional behavior | Kristina Okamoto | |
11:15 - 11:45 | Breakout Group Brainstorm #1 – lithologies, data gaps, important considerations | ||
11:45 - 12:05 | Group Read-outs and Compilation | ||
12:05 - 13:00 | Lunch | ||
13:00 - 13:30 | Breakout Group Brainstorm #2 – Database design and metadata | ||
13:30 - 13:50 | Group Read-outs and Compilation | ||
13:50 - 14:10 | Group Discussion | ||
Session 2: SCEC Science – Outstanding Questions & Role of Rheology | |||
14:10 - 14:15 | Introduction | Sylvain Barbot | |
14:15 - 14:35 | Science Talk: Fault rheology from field to lab | Josie Nevitt | |
14:35 - 14:55 | Science Talk: New methods in measuring brittle deformation | Matěj Pěc | |
14:55 - 15:15 | Group Discussion | ||
Lightning talk session + Coffee Break | |||
15:15 - 15:30 | Coffee Break | ||
15:30 - 16:00 | Lightning talks for rheology posters at SCEC | ||
Session 3: Advocating for Rheology in the Future of SCEC Moderator: Alexis Ault | |||
16:00 - 16:05 | Introduction | Alexis Ault | |
16:05 - 16:30 | Science Talk: The future of rheology in SCEC and bridging SCEC and CRESCENT | Cailey Condit & Greg Hirth | |
16:30 - 16:45 | Group Discussion | ||
Wrap-up and Next Steps | |||
16:45 - 17:00 | Summary and closing remarks | Alexis Ault, Sylvain Barbot,Caroline Seyler | |
17:00 | Workshop Adjourns |
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.
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