The Next Leap Forward for SCEC Community Velocity Models
Conveners: Cliff Thurber and Christine Goulet
Date: October 2, 2018
Location: Kellogg West Conference Center, Pomona, California
SCEC Award: 18118
SUMMARY: The SCEC Community Velocity Models (CVMs) are among the most mature of the SCEC community models, but there is no question they can still be meaningfully refined and improved, and uncertainties better quantified. A 1-day workshop will be held on October 2, 2018 to formulate a plan for continued development and validation of the SCEC Community Velocity Models (CVMs). Key elements of the plan should include:
- Collecting new and/or tapping existing seismic and other datasets that can be used to improve and/or assess the CVMs,
- Developing computational workflows for producing CVM updates and estimated model uncertainties,
- Defining procedures for validating and potentially accepting updated CVMs,
- Identifying sources of funding that can help support CVM development.
Expected outcomes of this workshop will be (1) a set of specific action items for further CVM development and (2) proposal ideas for individuals or coordinated groups that respond to the 2019 SCEC Science Plan.
To promote discussion and due to logistics, the workshop is limited to 25 participants. Limited funds are available for travel support from outside the Los Angeles area, with priority for invited presenters, students, early career scientists. We anticipate participation by scientists with expertise in (1) body-wave, surface wave, and full waveform tomography, (2) model validation, (3) seismic and other data sources, (4) 3D model integration and representation, and (5) high-performance computing. If you (or someone you know) can make significant contributions to this effort, please contact the conveners.
WORKSHOP AGENDA: Below is the tentative agenda. There will be a small number of overview talks, with the meeting mainly devoted to short lightning talks and plenary discussion sessions. All presentations, including the lightning talks, should be targeted at the themes of the workshop. Rather than presenting your most recent work, we are seeking ideas for how to move forward with the CVMs, including broadening and facilitating community involvement, possible sources of new data and funding, software and computational issues, etc.
Presentation slides may be downloaded by clicking the file link next to the presentation 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.
TUESDAY OCTOBER 2, 2018
09:00 - 09:30 | Workshop Check-In | |
09:30 - 10:55 | Session 1: Overview and CVM/UCVM status Moderator: Cliff Thurber and Reporter: Alan Juarez |
|
09:30 | Welcome and Overview of Workshop Objectives (PDF, 985KB) | Cliff Thurber / John Vidale |
09:40 - 10:00 | Status of SCEC CVM-H (PDF, 2.6MB) | Andreas Plesch |
10:00 - 10:20 | Status Status of SCEC CVM-S (PDF, 2.1MB) | Christine Goulet |
10:20 - 10:40 | The SCEC UCVM framework (PDF, 2MB) | Phil Maechling |
10:40 - 10:55 | Break | |
10:55 - 12:30 | Session 2: SCEC CVMs - moving forward Moderator: Carl Tape and Reporter: Ashton Flinders |
|
10:55 - 11:00 | Lightning talks procedure | Cliff Thurber |
Lightning talks: New data sources | ||
11:00 | Contributions from ambient field correlations | Lise Retailleau |
11:05 | Use LargeN array data to constrain statistical properties of small scale shallow structure variability in basins (PDF, 2.4MB) | Arben Pitarka |
11:10 | Constraints on statistics of small-scale heterogeneities from sonic borehole logs (PDF, 1.7MB) | Kim Olsen |
11:15 | Local/regional studies (PDF, 5.3MB) | Rob Clayton |
11:20 | Distributed Acoustic Sensing (PDF, 975KB) | Cliff Thurber |
Transitional talk: new data/tomography | ||
11:25 | Towards joint Inversion of Rayleigh wave group velocities and body-wave travel times in CCSP Study Area | Avinash Nayak |
Lightning talks: Tomography methods | ||
11:30 | Data functionals for Full 3D Tomography | Alan Juarez |
11:35 | Smoothed receiver functions for joint inversion | Chengping Chai |
11:40 | New twists on joint inversions (time permitting) | Cliff Thurber |
Lightning talks: Validation and uncertainty | ||
11:45 | Model validation (PDF, 1.9MB) | Carl Tape |
11:50 | Comparing the CVM-S4.26 with the standardized | Egill Hauksson |
11:55 | Constraints on statistics of small-scale heterogeneities from high-frequency ground motion simulations (PDF, 1.2MB) | Kim Olsen |
Transitional talk: validation/computation | ||
12:00 | Deterministic CVM features are required for high-frequency (> 1 Hz simulations) (PDF, 522KB) | Rob Graves |
Lightning talks: Computational aspects | ||
12:05 | Interactive visualization of seismic data and models | Chengping Chai |
12:10 | Stretch and azimuthal angles within Transverse Mercator (UTM) during extraction of CVM gridded volumes (PDF, 1MB) | David Okaya |
12:30 - 13:30 | Lunch | |
13:30 - 15:30 | Session 3: Focused discussions Moderator: Cliff Thurber |
|
13:30 - 13:40 | Group discussion goals | Cliff Thurber |
13:40 - 14:10 | What are the most promising new data sources? | Reporter: Avinash Nayak |
14:10 - 14:40 | What is needed in terms of tomography method development? | Reporter: Carl Tape |
14:40 - 15:10 | How can we best accomplish model validation and assess model uncertainty? | Reporter: Cliff Thurber |
15:10 - 15:40 | What computational aspects will present the biggest challenges, and how can they be overcome? | Reporter: Kim Olsen |
15:40 - 16:00 | Break | |
16:00 - 17:00 | Session 4: How do we get there — new projects and funding Moderator: Christine Goulet and Reporter: Cliff Thurber |
|
16:00 - 16:05 | Goals for wrap-up discussions | Christine Goulet |
16:05 - 16:50 | Open discussion on new projects, funding possibilities | All |
16:50 - 17:00 | Closing Discussion: Recommendations and Action Items | Cliff Thurber |
17:00 | Workshop Adjourns |
PARTICIPANTS
*Tom Brocher (USGS)
Chengping Chai (ORNL)
Rob Clayton (Caltech)
*Russ Craymer (USGS)
Ashton Flinders (USGS)
Christine Goulet (SCEC/USC)
Rob Graves (USGS)
Egill Hauksson (Caltech)
Tran Huynh (USC)
Alan Juarez (USC)
Phil Maechling (SCEC/USC)
Avinash Nayak (UW-Madison)
David Okaya (USC)
Kim Olsen (SDSU)
Edric Pauk (USC)
Arben Pitarka (LLNL)
Andreas Plesch (Harvard)
Lise Retailleau (Stanford)
*Stu Nishenko (PG&E)
*Taka'aki Taira (UC Berkeley)
Carl Tape (U Alaska Fairbanks)
Cliff Thurber (UW-Madison)
John Vidale (SCEC/USC)
*Remote Participants