SCEC Community Models�Data Access Tutorial
Software Developers and Presenters:
Philip Maechling (Southern California Earthquake Center)
Mei-Hui Su (Southern California Earthquake Center)
CXM Co-Leaders:
Scott Marshall (Appalachian State University)
Laurent Montesi (University of Maryland)
Southern California Earthquake Center
SCEC Community Model Data Access Tutorial
The SCEC Community models describe a wide range of features of the southern California lithosphere and asthenosphere.
The collection of SCEC Community Models is collectively called the CXM. The current collection includes CFM, CVM, CSM, CTM, CGM, and CPD plus GFM and UCVM.
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CXM Overview
Community Fault Model (CFM)
Community Geodetic Model (CGM)
Community Paleoseismic Database (CPD)*
Community Rheology Model (CRM)
Community Stress Model (CSM)
Community Thermal Model (CTM)
Community Velocity Model (CVM)
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CFM
CGM
CRM
CSM
CTM
CVM
UCVM
CXM
CPD*
https://www.scec.org/research/cxm
https://www.scec.org/research/cxm
SCEC Community Modeling Scientific Goal
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CXM Data Access Workshop Goal
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CXM Data Access Exercises
Community Fault Model (CFM)
Community Rheology Model (CRM)
Community Thermal Model (CTM)
Community Velocity Model (CVM)
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CFM
CGM
CRM
CSM
CTM
CVM
UCVM
CXM
CPD*
https://www.scec.org/research/cxm
https://www.scec.org/research/cxm
Today’s workshop exercises will focus on Web viewer data access to CFM, CVM (UCVM), and CRM components (GFM and CTM).
SCEC CXM Research Page
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Interactive model viewers
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http://training.scec.org/GFM_web/web/viewer.php
http://training.scec.org/UCVM_web/web/viewer.php
Santa Maria basin Vp model
Community Fault Model (CFM) Research Page
The CFM is an object-oriented three-dimensional geometric representation of more than 820 fault objects in southern California and adjacent offshore basins for which Quaternary activity has been established (or is deemed probable) and that are considered capable of producing moderate to large earthquakes. The CFM provides triangulated surface representations (t-surfs) that are defined based on surfaces traces, seismicity, seismic reflection profiles, wells, and geologic cross sections and models. The CFM is suitable for use in wide range of fault-related research projects.
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Community Fault Model (CFM) Zenodo Page
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The SCEC CFM Zenodo page distributes CFM v6.0 as a 64MB zip file that contains three-dimensional representation of active faults in southern California and adjacent offshore basins. For each fault object, the CFM provides triangulated surface representations (t-surfs) in several resolutions, fault traces in several different file formats (shape files, GMT plain text, and oogleEarth kml), and complete metadata including references used to constrain the surfaces.
Cite as: Marshall, Scott, Plesch, Andreas, & Shaw, John. (2023). SCEC Community Fault Model (CFM) (6.0) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.7809330
Community Fault Model (CFM) Web Viewer
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The CFM web viewer helps users visualize and download CFM data.
Community Velocity Model (CVM) Research Page
SCEC velocity models provide information about seismic velocities and density in the earth crust. Typical information provided by velocity models include Vp, Vs, density and they can provide external calculated Vs30, Z1.0, Z2.5, and (scaled) Qp, Qs
The original SCEC CVM, called CVM-S4 was last updated in 2003.
A more recent model, developed by a group at Harvard, called CVM-H was released in 2015.
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CVM-H - IRIS EMC-Earth Models Page
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The CVM-H v15.1 has been contributed to the IRIS Earth Models collection as a netcdf file. CVM-H is composed of detailed basin velocity descriptions that use tens of thousands of direct velocity measurements and incorporate the locations and displacements of major fault zones that influence basin structure. These basin descriptions are used to develop tomographic models of crust and upper mantle velocity structure, which are subsequently iterated and improved using 3D waveform adjoint tomography.
Cite as: Shaw, J. H., A. Plesch, C. Tape, M. P. Suess, T. H. Jordan, G. Ely, E. Hauksson, J. Tromp, T. Tanimoto, R. Graves, K. Olsen, C. Nicholson, P. J. Maechling, C. Rivero, P. Lovely, C. M. Brankman, J. Munster (2015). Unified Structural Representation of the southern California crust and upper mantle. Earth and Planetary Science Letters. 415 1, doi: 10.1016/j.epsl.2015.01.016 SCEC Contribution 2004
Unified Community Velocity Model (UCVM) Software Page
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SCEC’s UCVM software is not a velocity model.
It is a software package the provides access to multiple existing velocity models.
UCVM is open-source (Linux) software that provides access to multiple California velocity models.
UCVM is used to build large velocity meshes used to perform earthquake wave propagation simulations for California.
Details about the current release of UCVM are provided on the SCEC’s UCVM Software Home Page
Unified Community Velocity Model (UCVM) Github Page
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UCVM is distributed as open-source software from the UCVM Github repository. New velocity models are integrated into UCVM on a regular basis. There are several ways to access the UCVM software.
UCVM is used by the SCEC CVM Web viewer. This site is recommended for users investigating the available CVMs.
Small or moderate users can access CVM models using a UCVM Docker image on Dockerhub.
Large-scale users, such as ground motion modelers running simulations on HPC systems, will want to retrieve and build UCVM.
Cite as: Small, P., Gill, D., Maechling, P. J., Taborda, R., Callaghan, S., Jordan, T. H., Ely, G. P., Olsen, K. B., & Goulet, C. A. (2017). The SCEC Unified Community Velocity Model Software Framework. Seismological Research Letters, 88(5). doi:10.1785/0220170082. SCEC Contribution 2067
Community Velocity Model (CVM) Web Viewer
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The Community (Velocity) Model web viewer helps users visualize and download CVM data. It uses the Unified Community Velocity Model (UCVM) Software to access a collection of CVMs.
The Community Velocity Model Web Viewer overlays other SCEC community models including CFM and CTM onto the velocity models.
Community Geodetic Model (CGM) Research Page
The Community Geodetic Model (CGM) is designed to assist in the understanding of the interseismic, coseismic, postseismic, and hydrologic processes associated with the earthquake cycle along the complex fault network of the Southern San Andreas system. The CGM includes time series and velocities from both GPS and InSAR based observations as well as consensus strain rate products. The CGM provides access to GNSS and InSAR velocity data and timeseries.
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Community Geodetic Model (CGM) Zenodo Page
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The SCEC CGM Zenodo page distributes the CGM as a 1Gb Zip file. This distribution containers CGM1 which is a time-independent set of products, consisting of velocities of the Earth's surface measured by GPS and InSAR, and derived horizontal velocity and strain rate fields interpolated from the geodetic data using a variety of methodologies. The preferred, average (mean) fields and the individual contributions from participating researchers are included in this version.
Cite as: Sandwell, David T., Zeng, Yuehua, Shen, Zheng-Kang, Crowell, Brendan, Murray, Jessica, McCaffrey, Robert, & Xu, Xiaohua. (2016). SCEC Community Geodetic Model (CGM) (Version 1) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.4926528
Community Rheology Model (CRM) Research Page
The SCEC Community Rheology Model (CRM) is a rheological description of the southern California lithosphere, based on an ongoing synthesis of geophysical and geological data.
The CRM comprises three main ingredients: (1) a community thermal model (CTM), (2) a 3D geologic framework model (GFM), and (3) constitutive relationships applicable to low- and high-strain (shear zone) settings.
The CRM provides a model for southern California’s ductile rheology. Given strain rate(s), effective viscosity and differential stress may be calculated throughout the region.
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Community Rheology Model (CRM) Zenodo Page
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The CRM is distributed on Zenodo as 3.1Mb Zip file that contains the following:
Cite as: Hearn, Elizabeth, Montesi, Laurent, Oskin, Mike, Hirth, Greg, Thatcher, Wayne, & Behr, Whitney. (2020). SCEC Community Rheology Model (CRM) (20.9) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.4579627
Geological Framework Model (CRM/GFM) Research Page
The Geological Framework Model (GFM) describes rock types (lithologies) using six different minerals (Quartz, Feldspar, Biotite, Pyroxene, Amphibole, Olivine).
The GFM community model, along with the Community Thermal Model, is a component of the Community Rheology Model (CRM).
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Geological Framework Model (CRM/GFM) Zenodo Page
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The GFM is distributed on Zenodo as part of the CRM model. The CRM is a 3.1Mb Zip file that contains the following:
Cite as: Hearn, Elizabeth, Montesi, Laurent, Oskin, Mike, Hirth, Greg, Thatcher, Wayne, & Behr, Whitney. (2020). SCEC Community Rheology Model (CRM) (20.9) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.4579627
Community Thermal Model (CTM) Research Page
The CTM provides estimates of temperatures and thermal properties of the southern California lithosphere.
The CTM temperatures are calculated using rules for specific heat flow regions defined in the GFM, including steady-state geotherm models, ocean crust heat flow models, and low mean heat flow models.
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CTM Model (CTM) Zenodo Page
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The CTM data is distributed on Zenodo is 21.2MB File containing computational codes, region definitions, and metadata. A Google Colab notebook query tool with associated files an alternative (Shinevar et al., 2018) thermal model.
Cite as: Thatcher, Wayne, Shinevar, William, Chapman, David, & Hearn, Elizabeth H. (2020). SCEC Community Thermal Model (CTM) (20.8) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.4010834
GFM/CTM Model (GFM/CTM) Web Viewer
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The GFM web viewer helps users visualize and query the GFM and CTM models.
The GFM/CTM Web Viewer
Inputs a point as
Returns properties from several CXM models including:
Community Stress Model (CSM) Research Page
The Community Stress Model (CSM) is designed to a suite of models and constraints on the stress and stressing rate in the southern California lithosphere. The CSM currently consists of multiple different models of stress and stressing rate, based on different types of data, methodology, and assumptions.
There is a range of potential uses for the CSM, including earthquake stress triggering studies and dynamic earthquake rupture modeling.
A CSM Web Viewer is Under Development in 2023
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CSM Model (CSM) Data Downloads
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The CSM data is distributed via links on the CSM research page:
The CSM is currently are defined for the southern California lithosphere, in a standardized format on a common grid:
A CSM Web Viewer is under development for 2023
Thanks!
https://scec.org/research/CXM
Southern California Earthquake Center