Home  /  SCEC Workshops  /  SCEC Dynamic Rupture TAG – 2020 Ingredients Workshop – Rock Properties

SCEC Dynamic Rupture TAG – 2020 Ingredients Workshop – Rock Properties

Conveners: Ruth Harris and Michael Barall
Date/Time:  October 27, 2020 (09:00-13:15 Pacific Time or UTC-7)
SCEC Award and Report: 20188

SUMMARY: Starting in 2018, the SCEC Dynamic Rupture Group began a detailed examination of the essential ingredients needed to understand earthquakes and produce viable large-earthquake source simulations.  We first focused on fault geometry, at the November 2018 workshop. In the second workshop in January 2020, we focused on fault friction. This workshop in October 2020 was the third of the series, and after a presentation about the 3D thermal pressurization benchmark exercise that group members conducted, focusing on rock properties.  We invited speakers from both outside and inside our group to present their ideas about rock properties, including velocity structures, what it looks like in the Earth, and how our choices for rock properties in our computational models affect rupture behavior and ground shaking.

Questions we hoped to answer in this rock properties workshop include:

  1. How do our choices of rock properties affect ground shaking?
  2. How do our choices of rock properties affect earthquake rupture behavior?
  3. Are our rock properties assumptions more or less important than our other ‘ingredients’ such as fault geometry and fault friction?  

Due to the ongoing COVID-19 pandemic, this workshop was held as a Zoom meeting on October 27, 2020. The program consisted of a few presentations, with ample time for Q&A and discussion. To promote active discussions, the workshop was limited to 50 participants.

Workshop Agenda

Presentation videos 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 They may contain unpublished or preliminary information and should only be used while viewing the talk. Only the presentations for which SCEC has received permission to post publicly are included below.

09:00 - 09:15 Introduction to the workshop (PDF) Ruth Harris
09:15 - 09:35 Self-Introductions by All Participants All
09:35 - 10:00 Thermal pressurization 3D benchmark and results (VIDEO) Alice Gabriel
10:00 - 10:30 SCEC Community Velocity Model (CVM-H) Andreas Plesch
10:30 - 11:00 Break  
11:00 - 11:30 Effects of velocity and attenuation structure on dynamic rupture and ground motions (VIDEO) Kim Olsen
11:30 - 11:50 Effects of off‐fault inelasticity on near‐fault directivity pulses (VIDEO) Yongfei Wang
11:50 - 12:05 Break  
12:05 - 12:30 How do near-fault low-velocity structures affect dynamic rupture and ground motion? (VIDEO) Yihe Huang
12:30 - 13:15 Discussion and Wrap-up All
13:15 Workshop Adjourns  

Workshop Participants

The Southern California Earthquake Center is committed to providing a safe, productive, and welcoming environment for all participants. We take pride in fostering a diverse and inclusive SCEC community, and therefore expect all participants to abide by the SCEC Activities Code of Conduct SCEC Activities Code of Conduct.