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 | Impact of heterogeneity on fault friction in space and time | Srisharan Shreedharan | |
10:55 - 11:15 | Microphysical controls on frictional behavior | Kristina Okamoto | |
11:15 - 11:45 | Breakout Group Brainstorm #1 – Lithologies, data, and metadata for database | ||
11:45 - 12:05 | Group Read-outs and Compilation | ||
12:05 - 13:00 | Lunch | ||
13:00 - 13:05 | Developing constitutive laws | Sylvain Barbot | |
13:05 - 13:30 | Breakout Group Brainstorm #2 (new groups) – “Futurecasting the CRM,” how can the CRM serve future constitutive relationships? | ||
13:30 - 13:50 | Group Read-outs and Compilation | ||
13:50 - 14:10 | Group Discussion - What’s missing and what is needed? | ||
Session 2: SCEC Science – Outstanding Questions & Role of Rheology | |||
14:10 - 14:15 | Introduction | Sylvain Barbot | |
14:15 - 14:35 | Fault rheology from field to lab | Josie Nevitt | |
14:35 - 14:55 | 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 | ||
Simulating Earthquake Cycles with Lab-derived, Physics-based Friction | Binhao Wang | ||
Effects of roughness on fault friction from slow to fast velocities | Monica Barbery | ||
Probing Frictional Fault Properties From Tidal and Hydrological Seismicity Modulations | Roland Bürgmann | ||
Evolution of fault properties at geothermal conditions | Tamara Jeppson | ||
Impacts of hydrothermal alteration on spatiotemporal evolution of fault zone properties | Zachary Smith | ||
Emergent Bimaterial Slip Zones Control Strain Localization and Off-Fault Deformation along Plate Boundary Faults, Death Valley, California | Folarin Kolawole | ||
Creep experiments results of the SAF damage zone rocks and their viscoplastic properties | Nairong Du | ||
Fault zone healing: time-dependent rheology changes | Christie Rowe | ||
Viscoplastic rheology for characterizing the bulk rheology of fault zone rocks. | Hiroki Sone | ||
Geological and Frictional Characterization of Damage Zone Structure of the Southern San Andreas Fault at Ferrum and Implications for Coseismic Off-Fault Deformation | Ashley Griffith | ||
Frictional properties and K-Ar geochronology reveal a multi-million year history of earthquakes and slow slip events in the southern San Andreas fault gouge | Alexandra DiMonte | ||
What do we really know about friction of natural gouges? | Heather Savage | ||
Session 3: Advocating for Rheology in the Future of SCEC Moderator: Alexis Ault | |||
16:00 - 16:05 | Introduction | Alexis Ault | |
16:05 - 16:10 | Comments from SCEC Director Designate Ahmed Elbanna | Ahmed Elbanna | |
16:10 - 16:35 | The future of rheology in SCEC and bridging SCEC and CRESCENT | Cailey Condit & Greg Hirth | |
16:35 - 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 |
Last Name | First Name | Organization |
---|---|---|
Ault | Alexis | USU |
Barbery | Monica | Brown |
Barbot | Sylvain | USC |
Bürgmann | Roland | UC Berkeley |
Cebry | Sara | USGS |
Condit | Cailey | UW |
DiMonte | Alexandra | USU |
Du | Nairong | U Wisconsin |
Elbanna | Ahmed | USC |
Griffith | Ashley | Ohio State |
Hirth | Greg | Brown |
Jeppson | Tamara | USGS |
Kolawole | Folarin | Columbia |
Krogh | Julia | UC Santa Cruz |
Kruger | Ilene | UC Santa Cruz |
Lee | Terry | UNR |
Madden | Elizabeth | San Jose State |
Montesi | Laurent | U Maryland |
Nevitt | Josie | USGS |
Okamoto | Kristina | U Minnesota |
Peč | Matěj | MIT |
Pinilla Ramos | Camilo Ignacio | USC/SCEC |
Rowe | Christie | UNR |
Savage | Heather | UC Santa Cruz |
Seyler | Caroline | USC |
Shreedharan | Srisharan | USU |
Smith | Zachary | UC Berkeley |
Sone | Hiroki | U Wisconsin |
Tullis | Terry | Brown |
Vashishtha | Mradula | Stony Brook |
Wang | Binhao | USC |
Wickenhauser | Otis | UC Santa Cruz |
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