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
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).
Presentation materials may be viewed by clicking the links below. PLEASE NOTE: Files are the author’s property. They may contain unpublished or preliminary information and should only be used for reviewing the talk. Only the presentations for which SCEC has received permission to post publicly are included below.
| Time | Description | Presenter | |
|---|---|---|---|
| 09:00 - 09:20 | Introduction (PDF) | Ruth Harris | |
| 09:25 - 10:00 | Coseismic fault friction: Recent observations from laboratory experiments and links to natural faults (PDF) | Monica Barbery | |
| 10:05 - 10:20 | Earth materials in motion: CRM workshop highlights and new results on the influence of mineralogy and fabric on fault slip | Alexis Ault | |
| 10:25 - 10:40 | Laboratory Stress Drop and Fault Slip: Near-field stress measurements from a laser internal load cell (PDF) | Eric Burdette | |
| 10:45 - 11:00 | Lightning Talks on New Science Ideas (videos) 1-slide, 100-seconds (videos) | ||
| 11:05 - 11:20 | Break | ||
| 11:25 - 11:40 | Fault healing and asperity partitioning on a frictionally heterogeneous laboratory fault (PDF) | Jun Young Song | |
| 11:45 - 12:00 | Simulations of Thermal Pressurization on Rough Faults: Rupture Dynamics and Temperature Evolution (PDF) | Yuval Tal | |
| 12:05 - 12:20 | Fault pseudotachylytes: recent advances and open questions (PDF) | Eric Ferre | |
| 12:25 - 13:00 | Break | ||
| 13:05 - 13:20 | Transient Strain and Electrical Conductivity due to Fault Formation in Laboratory Stepovers | 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 (videos) | ||
| 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 (PDF) | Fabian Kutschera | |
| 15:00 - 15:07 | SEAS TAG (VIDEO) | TAG leader - Valere Lambert | |
| 15:12 - 15:19 | Stress Drop TAG (PDF) | 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.
| First Name | Last Name | Organization |
|---|---|---|
| Aakash | Gupta | UAF |
| Abdullah | Imran | UT El Paso |
| Alejandro | Aguilar | USU |
| Alex | DiMonte | USU |
| Alexis | Ault | USU |
| Alice | Gabriel | UCSD |
| Amy | Lu | McGill |
| Annemarie | Baltay | USGS |
| Arushi | Saxena | UC Davis |
| Awais | Butt | NUST |
| Ayomiposi | Falade | CERI |
| Badie | Rowshandel | CEA |
| Baoning | Wu | UCSD |
| Benchun | Duan | TAMU |
| Betsy | Madden | SJSU |
| Binhao | Wang | USC |
| Brad | Aagaard | USGS |
| Brittany | Botell | U Memphis |
| Brittany | Erickson | U Oregon |
| Caiyuan | Fan | ENS Paris |
| Carlo | Andrenacci | U "G. d'Annunzio" |
| Chiara | Cornelio | INGV |
| Christipher | Menges | USGS |
| Christos | Kyriakopoulos | CERI |
| Chukwuebuka | Nweke | USC |
| Clara | Yoon | USGS |
| Claudia | Abril | LMU |
| David | Kammer | ETH Zurich |
| Dilini | Walakulu Arachchige | SIU |
| Dimitri | Trifunac | Stanford |
| Edric | Pauk | USC/SCEC |
| Elizabeth | Hearn | USGS |
| Em | Vogel | U Michigan |
| Emma | Armstrong | USU |
| Eric | Burdette | USGS |
| Eric | Ferre | NMSU |
| Evan | Hirakawa | USGS |
| Evan | Marschall | UCSD Scripps |
| Fabian | Kutschera | UCSD |
| Fahrettin | Kuran | IUSS Pavia |
| Folarin | Kolawole | Columbia U |
| Francesco | Mosconi | Sapienza University |
| František | Gallovič | Charles University |
| Gabrielle | Hobson | UCSD |
| Guadalupe | Bravo | UC Riverside |
| Hasti | Bordbar | TAMU |
| Jarod | Domenge | UNIMIB |
| Jeremy | Wong | UCSD |
| Julian | Lozos | CSUN |
| Jun Young | Song | Cornell |
| Junle | Jiang | U Oklahoma |
| Karen | Luttrell | LSU |
| Kim | Olsen | SDSU |
| Kwabena | Poku-Agyemang | USU |
| Kyle | Withers | USGS |
| Lav | Joshi | Charles University |
| Leslie | Garcia | USU |
| Lilibeth | Contreras | UNAM |
| Lin | Zhang | CUP |
| Lorraine | Hwang | UC Davis |
| Lubica Valentova | K. | Charles U |
| Martin | Hronek | Charles U |
| Meritxell | Colet | Columbia |
| Michael | Barall | USGS |
| Mingqi | Liu | TAMU |
| Mohamed | Talaat | Simpson Gumpertz & Heger Inc. |
| Monica | Barbery | Brown/U of Utah |
| Nick | beeler | USGS |
| Peng | Zhai | UMich |
| Pierre | Romanet | Geoazur |
| Priyanka | Mishra | IITR |
| Rachel | Abercrombie | Boston U |
| Rachel Preca | Trapani | LMU Munich |
| Ruth | Harris | USGS |
| Sajan | K C | USC |
| Sara Beth | Cebry | USGS |
| SeongJu | Jeong | OU |
| SGT | Lamont | LDEO |
| Shuo | Ma | SDSU |
| Solene | Antoine | Caltech |
| Srisharan | Shreedharan | USU |
| Suli | Yao | ENS Paris |
| Tamara | Jeppson | USGS |
| Wei | Feng | GFZ |
| Wenqiang | Zhang | Stanford |
| Xiaofeng | Chen | OK State |
| Yajing | Liu | McGill U |
| Yuko | Kase | GSJ |
| Yuto | Sasaki | University of Osaka |
| Yuval | Tal | BGU |
| Zainab | Asaad | IUSS/Pavia/Italy |
| Zeyu | Lu | USTC |
| Zhiwei | Wang | CNRS |
| Zizhuang | Tang | TAMU |
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.