California Community Models for Seismic Hazard Assessments Workshop

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Do you have models or datasets that may contribute to seismic hazard assessments for California?

Complete this short survey to share your information on existing models and datasets that could be valuable inclusions to the California community models effort.

Your survey input by February 29th will shape workshop discussions.

Conveners: Brad Aagaard, Marine Denolle, Eric Fielding, Evan Hirakawa, Tran Huynh, Lorraine Hwang, Scott Marshall, Sarah Minson, Laurent Montesi, Arben Pitarka, Judy Zachariasen
Dates: March 4-5, 2024
Location: Online via Zoom

SUMMARY: With funding from NSF, USGS and other sponsors, the Southern California Earthquake Center has transitioned to become the Statewide California Earthquake Center (SCEC). This creates exciting research and collaboration opportunities that span the entire transform plate boundary, encompassing the Pacific and North American Plates from western Nevada to Baja California and Cape Mendocino.

SCEC, USGS, CGS, NASA, LLNL, CIG, and other academic partners invite you to an online workshop March 4-5, 2024 focused on developing “community models” for seismic hazard assessments in California. These community models integrate knowledge and describe a wide range of features in the California lithosphere and asthenosphere that influence seismic activity. These community earth models (CEMs) include: geologic models, fault models, rheology and thermal models, stress models, seismic velocity models, geodetic models and more. Our goal is to develop a robust and self-consistent suite of models for California usable by diverse experts to simulate seismic phenomena.

At the upcoming workshop, we'll explore use cases for California community models, assess existing models and datasets along the San Andreas Fault System, and identify areas for improvement and future collaborative research efforts. Our vision is to refine and merge regional models, ultimately creating internally-consistent, best-available models of the entire San Andreas Fault System.

Whether you're already invested or just curious, we welcome your participation! Join us in mapping a path towards statewide Community Earth Models for California.

Presentation slides may be downloaded by clicking the links following the title. 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 They may contain unpublished or preliminary information and should only be used while viewing the talk.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.

MONDAY, MARCH 4, 2024
All times Pacific Time

08:00 - 08:15	Introduction (PDF, 1.8MB)	Brad Aagaard
	Use cases for California community models
08:15 - 08:35	What scientific questions could we address with statewide community models?	Alice Gabriel
08:35 - 08:45	Discussion
08:45 - 09:05	How could statewide community models improve seismic hazard assessments?	Christine Goulet
09:05 - 09:15	Discussion
09:15 - 09:35	How could carbon sequestration in California use community models? (PDF, 3.2MB)	Dan Boyd
09:35 - 09:45	Discussion
09:45 - 10:00	Break
	Overview and inventory of existing community models
10:00 - 10:10	Geologic models (PDF, 4.9MB)	Russ Graymer / Mike Oskin
10:10 - 10:20	Fault models (PDF, 6.4MB)	Scott Marshall / Alex Hatem
10:20 - 10:30	Rheology and thermal models (PDF, 9.0MB)	Laurent Montesi / Wayne Thatcher
10:30 - 10:40	Stress models (PDF, 2.7MB)	Jeanne Hardebeck / Karen Luttrell
10:40 - 10:50	Seismic velocity models	Evan Hirakawa / Brad Aagaard
10:50 - 11:00	Geodetic models (PDF, 2.7MB)	Gareth Funning / Kathryn Materna
11:00 - 11:30	Discussion
11:30	Adjourn until tomorrow

TUESDAY, MARCH 5, 2024
All times Pacific Time

08:00 - 08:20	Community models in the Cascadia Region Earthquake Science Center (CRESCENT) (PDF, 3.2MB)	Amanda Thomas
08:20 - 08:30	Discussion
08:30 - 08:45	Breakouts: What does “community” in “community models” mean? What are the critical traits for a “community model” to be useful? What are the various roles people have in creating, maintaining, and using a “community model”? What are important factors for improving “community models”? How do we identify, communicate with, and involve community members?	All participants, are assigned and divided into the 13 Breakout Groups listed below.
08:45 - 09:15	Breakout Group Reports (1 slide each, 2-minutes per group)	Breakout Group Leaders
09:15 - 09:30	Break
	Techniques for integrating and embedding models
09:30 - 09:40	Data integration: Geodetic models from GNSS + InSAR (PDF, 1.9MB)	Mike Floyd / Katia Tymofyeyeva
09:40 - 09:50	Seamless embedding of seismic velocity models via integrated geologic models (PDF, 3.1MB)	Brad Aagaard
09:50 - 10:00	Embedding high resolution models in regional models using blending (PDF, 2.5MB)	Patricia Persaud
10:00 - 10:10	Embedding high resolution models in regional models using machine learning (PDF, 6.0MB)	Yehuda Ben-Zion
10:10 - 10:20	Discussion
10:20 - 10:40	Plenary discussion: Incentives for participating in community models
10:40 - 11:00	Wrap-up discussion: Looking ahead
11:00	Adjourn

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PARTICIPANTS

Breakout Group 13

Co-Moderators:
Eric Fielding (JPL)
Participants:
Niloufar Abolfathian (OAI)
Esam Abraham (USC)
James Conrad (USGS)
Michael DeFrisco (CGS)
Humberto Alfonso García Montano (CIACE, UNAN-Managua)
Eric Geist (USGS)
Lorraine Hwang (UC Davis CIG)
Mike Oskin (UC Davis)
Andriniaina Tahina Rakotoarisoa (IOGA, Madagascar)
Tsiriandrimanana Rakotondraibe (IOGA)
Andry Mampionona Ramarolahy (IOGA)
Cliff Thurber (U Wisconsin-Madison)
Michael Turner (CEC)

PARTICIPANTS

Breakout Group 1

Breakout Group 2

Breakout Group 3

Breakout Group 4

Breakout Group 5

Breakout Group 6

Breakout Group 7

Breakout Group 8

Breakout Group 9

Breakout Group 10

Breakout Group 11

Breakout Group 12

Breakout Group 13

For Researchers

For The Media