Community Velocity Model Topical Workshop

May 13-14, 2024, 8:00 am – 12:00 pm PST – online

Meeting Goals

An online workshop to update the community on CRESCENT CVM goals and broaden the participation of/interaction with the Cascadia-focused research community. The workshop will include presentations and discussions on existing velocity models, velocity model creation workflows, model validation techniques, and uses of velocity models by various sub-disciplines and communities to further research agendas. We look to solicit feedback and create potential collaborations that can contribute to the success of the CRESCENT CVM by learning from prior experiences and better understanding community needs, uses, considerations, and potential pitfalls.

Figures from US Geological Survey Open-File Report 2017–1152.


Note: all times Pacific Time

DAY 1: Monday, May 13th

8:00-8:10am | Introduction to CRESCENT and CVM

8:10-10:00am | The Present and Future of CVM

8:10-8:25am | CVM development workflows and Northern California examples, Brad Aagaard, USGS

8:25-8:40am | CASIE21: Interface constraints, Shuoshuo Han, University of Texas

8:40-8:55am | CASIE21: Offshore velocity model development, Pablo Canales, WHOI

8:55-9:10am | Basin structure development, Sheri Molnar, University of Western Ontario

9:10-9:15am | Break

9:15-9:30am | Regional models and tectonics: Canadian Cordillera, Andrew Schaeffer, NRCan

9:30-9:45am | CVM needs for ground motion modeling, Artie Rodgers, LLNL

9:45-10:00am | Observations from the US portion of Cascadia and the future of the CVM, Jonathan Delph, Purdue University

10:00-10:15am | Break

10:15am-12:00pm | Community Input – Model Uses

10:15-10:20am | Introduction to Breakouts

10:20-11:00am | Breakout 1: user group CVM needs – ground motions, tectonics, offshore structure, crustal and fault structure

11:00-11:10am | Breakout 1 summaries

11:10-11:50am | Breakout 2: model workflow, considerations, and usability

11:50-12:00pm | Breakout 2 summaries and Day 2 Preview

DAY 2: Tuesday, May 14th

8:00-8:10am | Welcome and overview

8:10-9:10am | Interacting with EarthScope, Manochehr Banavar

9:10-9:20am | Break

9:20-10:20am | Model merging and validation

9:20-9:40am | Model merging methods, Rasheed Ajala, LDEO

9:40-10:00am | Validating and merging CVMs, Evan Hirakawa, USGS

10:00-10:20am | Status of the USGS CVM, Erin Wirth, USGS

10:20-11:15am | Breakout: model updating and merging needs, desires and feedback

11:15-11:45am | Breakout summaries, discussion, and workshop conclusions

Meet The Team

CVM Leadership

The CRESCENT CVM team combines expertise in multiscale observational seismology imaging techniques (e.g., ambient noise, teleseismic, and local earthquake data, and onshore/offshore active-source data) with expertise in ground motion modeling and the typical applications and uses of a CVM. We will collaboratively produce a community model that is useful and applicable to a variety of subduction zone science applications including dynamic rupture modeling, structural and geologic interpretation, and ground motion modeling.

Alex grant, US Geological Survey

alex grant
United States Geological Survey

Valerie Sahakian, University of Oregon

Valerie Sahakian
P&A Program Lead

Pieter-Ewald Share, Oregon State University

Pieter-Ewald Share
Oregon State University

Emilie Hooft, University of Oregon

Emilie Hooft
University of Oregon

Erin Wirth, US Geological Survey

Erin Wirth
United States Geological Survey

Jonathan Delph, Purdue University

Jonathan Delph
Purdue University

Ben He (Postdoc)
University of Texas at Dallas

Bill Stephenson
United States Geological Survey

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