UCVM FAQ - Revision history

Mei: /* Official Version of UCVM */

2026-10-05T17:45:02Z

Official Version of UCVM

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	== Official Version of UCVM ==		== Official Version of UCVM ==
	The current ~~(May 2018)~~ official release of UCVM is UCVM ~~v17~~.1 ~~which is the last release of the C-language~~ version ~~of UCVM. This~~ can be obtained by cloning the ~~UCVMC github repository. The UCVMP (Python language version of UCVM)~~ release ~~is under review, but is not currently used for research purposes~~.		The current official release of UCVM is UCVM v25.7.1. The latest development version can be obtained from cloning UCVM's GitHub repository and the stable release from the GitHub Releases.

	== Naming of CVMs ==		== Naming of CVMs ==

Maechlin at 23:09, 1 November 2018

2018-11-01T23:09:02Z

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	== ~~Profiles~~ ==		== UCVM Documentation ==
			The current UCVM maintained documentation is posted on github at:
			*[https://github.com/SCECcode/UCVMC/wiki UCVM Wiki]

	[[LA Vertical Profiles]]		== Vertical Profiles ==
			*[[LA Vertical Profiles]]

	== Official Version of UCVM ==		== Official Version of UCVM ==
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	== Naming of CVMs ==		== Naming of CVMs ==

	Velocity Models that can be accessed through the UCVM interface are identify by '''a scientific name''', and also by '''an internal UCVM short identifier''' that is used to identify the velocity model when using UCVM. A description of available velocity models, and their UCVM identifiers is posted here:		Velocity Models that can be accessed through the UCVM interface are identify by '''a scientific name''', and also by '''an internal UCVM short identifier''' that is used to identify the velocity model when using UCVM. A description of available velocity models, and their UCVM identifiers is posted here:
	*[https://github.com/SCECcode/UCVMC/wiki/Registered-CVMs UCVM CVMs]		*[https://github.com/SCECcode/UCVMC/wiki/Registered-CVMs UCVM CVMs]

	As an example, the scientific name '''CVM-S4.26''' refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km. The '''internal UCVM short identifier''' for this model is "cvms5".		As an example, the scientific name '''CVM-S4.26''' refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km. The '''internal UCVM short identifier''' for this model is "cvms5".

	~~For discrete models like CVM-S4.26, which is defined on a 500m grid, UCVM uses trilnear interpolation to determine material properties between grid points.~~

	Velocity models can be selected during installation of UCVM, so not all UCVM installations will have access to all models.		Velocity models can be selected during installation of UCVM, so not all UCVM installations will have access to all models.

	*[https://github.~~com/SCECcode/UCVMC/wiki~~ UCVM ~~Wiki]~~		== Interpolation of Models Defined on Regular Grid ==
			For discrete models like CVM-S4.26, which is defined on a 500m grid, UCVM uses trilnear interpolation to determine material properties between grid points.

			== UCVM Software Installation Options ==
	Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If you are used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki.		Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If you are used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki.

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	We created a Virtual Box installation of UCVM which enables users to query common southern California Velocity models (CVM-S4, and CVM-S4.26) on a Mac. This virtual box image is posted it on a SCEC software workshop page [[Software_Workshop_2018]].		We created a Virtual Box installation of UCVM which enables users to query common southern California Velocity models (CVM-S4, and CVM-S4.26) on a Mac. This virtual box image is posted it on a SCEC software workshop page [[Software_Workshop_2018]].

			*[https://github.com/SCECcode/UCVMC/wiki UCVM Wiki]

	== Related Entries ==		== Related Entries ==
	*[[UCVM]]		*[[UCVM]]
	*[[Software_Workshop_2018]]		*[[Software_Workshop_2018]]

Maechlin at 23:04, 1 November 2018

2018-11-01T23:04:48Z

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	*[https://github.com/SCECcode/UCVMC/wiki/Installation Installation Instructions]		*[https://github.com/SCECcode/UCVMC/wiki/Installation Installation Instructions]

	We created a Virtual Box installation of UCVM which enables users to query common southern California Velocity models (CVM-S4, and CVM-S4.26) on a Mac. This virtual box image is posted it on a SCEC software workshop page []		We created a Virtual Box installation of UCVM which enables users to query common southern California Velocity models (CVM-S4, and CVM-S4.26) on a Mac. This virtual box image is posted it on a SCEC software workshop page [[Software_Workshop_2018]].

	== Related Entries ==		== Related Entries ==
	*[[UCVM]]		*[[UCVM]]
			*[[Software_Workshop_2018]]

Maechlin at 23:03, 1 November 2018

2018-11-01T23:03:47Z

← Older revision		Revision as of 23:03, 1 November 2018
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	== Naming of CVMs ==		== Naming of CVMs ==
	First, we should confirm which CVM you would like to work with. The naming of CVM's can be confusing, because the names have not been used consistently over the last few years. As of 2017, the CVM names have settled, and CVM-S4.26 refers to a specific tomography improved CVM.

	~~CVM-S4.26 refers to a version of CVM-S4~~ that ~~was developed using full 3D tomography~~ by ~~Po Chen and En-Jui Lee. It has~~ a ~~high min Vs (about 900m/s) and it defines Vp, Vs~~, and ~~rho on a 500 meter spaced grid~~. ~~It has no background model~~, and it is ~~only defined to about 50km~~.		Velocity Models that can be accessed through the UCVM interface are identify by '''a scientific name''', and also by '''an internal UCVM short identifier''' that is used to identify the velocity model when using UCVM. A description of available velocity models, and their UCVM identifiers is posted here:
			*[https://github.com/SCECcode/UCVMC/wiki/Registered-CVMs UCVM CVMs]

	~~When you query~~ it, UCVM ~~does~~ trilnear interpolation to determine material properties between grid points. ~~If this is the CVM model you want~~ to ~~work with, you can download it from a public repository at:~~		As an example, the scientific name '''CVM-S4.26''' refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km. The '''internal UCVM short identifier''' for this model is "cvms5".

			For discrete models like CVM-S4.26, which is defined on a 500m grid, UCVM uses trilnear interpolation to determine material properties between grid points.

			Velocity models can be selected during installation of UCVM, so not all UCVM installations will have access to all models.

	*[https://github.com/SCECcode/UCVMC/wiki UCVM Wiki]		*[https://github.com/SCECcode/UCVMC/wiki UCVM Wiki]

	Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If ~~your group is~~ used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki~~. I have gone through the UCVM installation process many times, and I know it can be challenging to new users~~.		Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If you are used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki.

	*[https://github.com/SCECcode/UCVMC/wiki/Installation Installation Instructions]		*[https://github.com/SCECcode/UCVMC/wiki/Installation Installation Instructions]

	~~If you are planning small-scale tests of the CVM-S4.26, we can provide~~ a Virtual Box installation which ~~would enable~~ users to query CVM-S4.26 on a Mac.		We created a Virtual Box installation of UCVM which enables users to query common southern California Velocity models (CVM-S4, and CVM-S4.26) on a Mac. This virtual box image is posted it on a SCEC software workshop page []

			== Related Entries ==
			*[[UCVM]]

Maechlin at 22:53, 1 November 2018

2018-11-01T22:53:58Z

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	CVM-S4.26 refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km.		CVM-S4.26 refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km.

	~~A recent release of UCVM includes this model.~~ When you query it, UCVM does trilnear interpolation to determine material properties between grid points. If this is the CVM model you want to work with, you can download it from a public repository at:		When you query it, UCVM does trilnear interpolation to determine material properties between grid points. If this is the CVM model you want to work with, you can download it from a public repository at:

	https://github.com/SCECcode/UCVMC/wiki		*[https://github.com/SCECcode/UCVMC/wiki UCVM Wiki]

	Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If your group is used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki. I have gone through the UCVM installation process many times, and I know it can be challenging to new users.		Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If your group is used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki. I have gone through the UCVM installation process many times, and I know it can be challenging to new users.

	https://github.com/SCECcode/UCVMC/wiki/Installation		*[https://github.com/SCECcode/UCVMC/wiki/Installation Installation Instructions]

	Let me know if this is the model you wish to work with, and if your group has Linux computers where they can install it. If so, I would recommend we have a telecon to walk one, or more, of your group through the installation process.		If you are planning small-scale tests of the CVM-S4.26, we can provide a Virtual Box installation which would enable users to query CVM-S4.26 on a Mac.

	If you are planning small-scale tests of the CVM-S4.26, we can provide a Virtual Box installation which would enable users to query CVM-S4.26 on a Mac~~. However, it might take us a few more days to create this kind of distribution.~~

	~~Hope this helps. Let me know if you'd like help getting a working version installed on a local Linux system~~.

Maechlin at 22:50, 1 November 2018

2018-11-01T22:50:12Z

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	== Profiles ==		== Profiles ==
	[[1D Profiles]]
			[[LA Vertical Profiles]]

	== Official Version of UCVM ==		== Official Version of UCVM ==

Maechlin at 22:49, 1 November 2018

2018-11-01T22:49:28Z

← Older revision		Revision as of 22:49, 1 November 2018
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			== Profiles ==
			[[1D Profiles]]

	== Official Version of UCVM ==		== Official Version of UCVM ==
	The current (May 2018) official release of UCVM is UCVM v17.1 which is the last release of the C-language version of UCVM. This can be obtained by cloning the UCVMC github repository. The UCVMP (Python language version of UCVM) release is under review, but is not currently used for research purposes.		The current (May 2018) official release of UCVM is UCVM v17.1 which is the last release of the C-language version of UCVM. This can be obtained by cloning the UCVMC github repository. The UCVMP (Python language version of UCVM) release is under review, but is not currently used for research purposes.

Maechlin at 23:43, 17 May 2018

2018-05-17T23:43:21Z

← Older revision		Revision as of 23:43, 17 May 2018
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	First, we should confirm which CVM you would like to work with. The naming of CVM's can be confusing, because the names have not been used consistently over the last few years. As of 2017, the CVM names have settled, and CVM-S4.26 refers to a specific tomography improved CVM.		== Official Version of UCVM ==
			The current (May 2018) official release of UCVM is UCVM v17.1 which is the last release of the C-language version of UCVM. This can be obtained by cloning the UCVMC github repository. The UCVMP (Python language version of UCVM) release is under review, but is not currently used for research purposes.

			== Naming of CVMs ==
			First, we should confirm which CVM you would like to work with. The naming of CVM's can be confusing, because the names have not been used consistently over the last few years. As of 2017, the CVM names have settled, and CVM-S4.26 refers to a specific tomography improved CVM.

	CVM-S4.26 refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km.		CVM-S4.26 refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km.

Maechlin: Created page with " First, we should confirm which CVM you would like to work with. The naming of CVM's can be confusing, because the names have not been used consistently over the last few year..."

2017-12-06T21:10:07Z

Created page with " First, we should confirm which CVM you would like to work with. The naming of CVM's can be confusing, because the names have not been used consistently over the last few year..."

New page

First, we should confirm which CVM you would like to work with. The naming of CVM's can be confusing, because the names have not been used consistently over the last few years. As of 2017, the CVM names have settled, and CVM-S4.26 refers to a specific tomography improved CVM.

CVM-S4.26 refers to a version of CVM-S4 that was developed using full 3D tomography by Po Chen and En-Jui Lee. It has a high min Vs (about 900m/s) and it defines Vp, Vs, and rho on a 500 meter spaced grid. It has no background model, and it is only defined to about 50km.

A recent release of UCVM includes this model. When you query it, UCVM does trilnear interpolation to determine material properties between grid points. If this is the CVM model you want to work with, you can download it from a public repository at:

https://github.com/SCECcode/UCVMC/wiki

Before you can query CVM-S4.26, UCVM must be built and installed on a Linux computer, such as USC HPC research computing center. If your group is used to building open-source software on Linux computers, then they may be able to work through the installation process described on the UCVM github wiki. I have gone through the UCVM installation process many times, and I know it can be challenging to new users.

https://github.com/SCECcode/UCVMC/wiki/Installation

Let me know if this is the model you wish to work with, and if your group has Linux computers where they can install it. If so, I would recommend we have a telecon to walk one, or more, of your group through the installation process.

If you are planning small-scale tests of the CVM-S4.26, we can provide a Virtual Box installation which would enable users to query CVM-S4.26 on a Mac. However, it might take us a few more days to create this kind of distribution.

Hope this helps. Let me know if you'd like help getting a working version installed on a local Linux system.