Community Velocity Models - Revision history

Pauk at 15:33, 19 March 2018

2018-03-19T15:33:25Z

Maechlin at 22:40, 15 February 2016

2016-02-15T22:40:14Z

Maechlin: moved Community Velocity Model to Community Velocity Models: There are more than one community velocity models

2016-02-10T23:44:20Z

moved Community Velocity Model to Community Velocity Models: There are more than one community velocity models

Maechlin: /* CVM-H v6.3capi */

2013-06-21T16:27:54Z

CVM-H v6.3capi

Maechlin: /* CVM-H */

2013-06-21T16:27:40Z

CVM-H

Maechlin: /* CVM-S */

2013-06-21T16:25:40Z

CVM-S

Maechlin at 05:13, 8 March 2011

2011-03-08T05:13:15Z

Maechlin at 05:12, 8 March 2011

2011-03-08T05:12:04Z

Maechlin at 05:06, 8 March 2011

2011-03-08T05:06:03Z

Maechlin at 04:18, 24 February 2011

2011-02-24T04:18:07Z

@@ Line 6: / Line 6: @@
 The CVM-H is a velocity model of crust and upper mantle structure in southern California developed by the SCEC community for use in fault systems analysis, strong ground motion prediction, and earthquake hazards assessment. The model describes seismic P- and S-wave velocities and densities, and is comprised of basin structures embedded in tomographic and teleseismic crust and upper mantle models.
-This latest release of the CVM-H (6.2) is an important milestone for SCEC, as it represents the integration of various model components, including fully 3D waveform tomographic results. The CVM-H 6.2 consists of basin structures defined using high-quality industry seismic reflection profiles and tens of thousands of direct velocity measurements from boreholes (Plesch et al., 2009; Süss and Shaw, 2003). The basin structures are also compatible with the locations and displacements of major faults represented in the SCEC Community Fault Model (CFM) (Plesch et al., 2007). These basin structures were used to develop travel time tomographic models of the crust (after Hauksson, 2000) extending to a depth of 35 km, and upper mantle teleseismic and surface wave models extending to a depth of 300 km (Prindle and Tanimoto, 2006). These various model components were integrated and used to perform a series of 3D adjoint tomographic inversions that highlight areas of the model that were responsible for mismatches between observed and synthetic waveforms (Tape et al, 2009). Sixteen tomographic iterations, requiring 6800 wavefield simulations, yielded perturbations to the starting model that have been incorporated in the latest model release. CVM-H 6.2 also incorporates a new Moho surface (Yan and Clayton, 2007) and a series of other upgrades to the geotechnical layer (GTL), the Vp-density scaling relationship, and the code that delivers the model.
+This latest release of the CVM-H (6.2) is an important milestone for SCEC, as it represents the integration of various model components, including fully 3D waveform tomographic results. The CVM-H 6.2 consists of basin structures defined using high-quality industry seismic reflection profiles and tens of thousands of direct velocity measurements from boreholes (Plesch et al., 2009; Süss and Shaw, 2003). The basin structures are also compatible with the locations and displacements of major faults represented in the [https://www.scec.org/research/cfm SCEC Community Fault Model (CFM)] (Plesch et al., 2007). These basin structures were used to develop travel time tomographic models of the crust (after Hauksson, 2000) extending to a depth of 35 km, and upper mantle teleseismic and surface wave models extending to a depth of 300 km (Prindle and Tanimoto, 2006). These various model components were integrated and used to perform a series of 3D adjoint tomographic inversions that highlight areas of the model that were responsible for mismatches between observed and synthetic waveforms (Tape et al, 2009). Sixteen tomographic iterations, requiring 6800 wavefield simulations, yielded perturbations to the starting model that have been incorporated in the latest model release. CVM-H 6.2 also incorporates a new Moho surface (Yan and Clayton, 2007) and a series of other upgrades to the geotechnical layer (GTL), the Vp-density scaling relationship, and the code that delivers the model.
 [http://isites.harvard.edu/icb/icb.do?keyword=k93600&pageid=icb.page577442&pageContentId=icb.pagecontent1243182&state=maximize&view=view.do&viewParam_name=SCEC%20CVM%20Community%20Velocity%20Model/SCEC%20Community%20Velocity%20Modeul%20CVM-H Harvard Modeling Group Page]

@@ Line 39: / Line 39: @@
 == See Also ==
 *[http://www.scec.org SCEC Home Page]
 *[[Getting started and Getting Wiki Help]]

← Older revision		Revision as of 16:27, 21 June 2013
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	[http://www.data.scec.org/research-tools/3d-velocity.html SCEC Data Center CVM Page]		[http://www.data.scec.org/research-tools/3d-velocity.html SCEC Data Center CVM Page]
−
−	~~== [[CVM-H v6.3capi]] ==~~
−
−	This is a version of CVM-H v6.3 that includes modifications to support query by depth. This version of CVM-H v6.3 includes the vx-lite interface which provides a standard method of removing topography when building flat meshes.
−
−	~~This version of CVM-H has been further developed into CVM-H v11.2 and later. No further updates of CVM-H v6.3 are expected.~~

	== Geotechnical Layer ==		== Geotechnical Layer ==

@@ Line 8: / Line 8: @@
 This latest release of the CVM-H (6.2) is an important milestone for SCEC, as it represents the integration of various model components, including fully 3D waveform tomographic results. The CVM-H 6.2 consists of basin structures defined using high-quality industry seismic reflection profiles and tens of thousands of direct velocity measurements from boreholes (Plesch et al., 2009; Süss and Shaw, 2003). The basin structures are also compatible with the locations and displacements of major faults represented in the SCEC Community Fault Model (CFM) (Plesch et al., 2007). These basin structures were used to develop travel time tomographic models of the crust (after Hauksson, 2000) extending to a depth of 35 km, and upper mantle teleseismic and surface wave models extending to a depth of 300 km (Prindle and Tanimoto, 2006). These various model components were integrated and used to perform a series of 3D adjoint tomographic inversions that highlight areas of the model that were responsible for mismatches between observed and synthetic waveforms (Tape et al, 2009). Sixteen tomographic iterations, requiring 6800 wavefield simulations, yielded perturbations to the starting model that have been incorporated in the latest model release. CVM-H 6.2 also incorporates a new Moho surface (Yan and Clayton, 2007) and a series of other upgrades to the geotechnical layer (GTL), the Vp-density scaling relationship, and the code that delivers the model.
-[http://structure.harvard.edu/cvm-h/ Harvard Modeling Group Page]
+[http://isites.harvard.edu/icb/icb.do?keyword=k93600&pageid=icb.page577442&pageContentId=icb.pagecontent1243182&state=maximize&view=view.do&viewParam_name=SCEC%20CVM%20Community%20Velocity%20Model/SCEC%20Community%20Velocity%20Modeul%20CVM-H Harvard Modeling Group Page]
 == [[CVM-S]] ==

@@ Line 17: / Line 17: @@
 The purpose of the Three-Dimensional Community Velocity Model for Southern California is to provide a unified reference model for the several areas of research that depend of the subsurface velocity structure in their analysis. These include strong motion modeling, seismicity location, and tomographic velocity modeling. It is also hoped that the geologic community will find the basin models useful because they are based on structures and interfaces that are largely derived from geologic structure models. The deeper sediment velocities themselves are obtained from empirical relationships that take into account age of the formation and depth of burial. The coefficients of these relationships are calibrated to sonic logs taken from boreholes in the region. Shallow sediment velocities are taken from geotechnical borehole measurements. Hardrock velocities are based on tomographic studies.
-[http://www.data.scec.org/3Dvelocity/ SCEC Data Center CVM Page]
+[http://www.data.scec.org/research-tools/3d-velocity.html SCEC Data Center CVM Page]
 == [[CVM-H v6.3capi]] ==

← Older revision	Revision as of 23:44, 10 February 2016
(No difference)

@@ Line 40: / Line 40: @@
 == Related Entries ==
 *[[UCVM]]
 *[[Goodness of Fit]]
 *[[CVM Toolkit]]

@@ Line 19: / Line 19: @@
 [http://www.data.scec.org/3Dvelocity/ SCEC Data Center CVM Page]
 == Geotechnical Layer ==
 {| class="wikitable" | border="0"
@@ Line 30: / Line 37: @@
 |}
 == Related Entries ==

← Older revision		Revision as of 05:06, 8 March 2011
Line 18:		Line 18:

	[http://www.data.scec.org/3Dvelocity/ SCEC Data Center CVM Page]		[http://www.data.scec.org/3Dvelocity/ SCEC Data Center CVM Page]
		+
		+
		+	== Geotechnical Layer ==
		+
		+	{\| class="wikitable" \| border="0"
		+	\|-
		+	\|-
		+	\| [[Image:cvm-s4_gtl.png\|256px\|thumb\|right\|Fig 1: CVM-S v4.0 Surface Vs Map]]
		+	\| [[Image:cvm-h_nogtl.png\|256px\|thumb\|right\|Fig 2: CVM-H v6.3 Surface Vs Map]]
		+	\| [[Image:cvm-h_vs30gtl.png\|256px\|thumb\|right\|Fig 3: CVM-H v11.2 with Vs30 Geotechnical Layer Surface Vs Map]]
		+	\|}

	== [[CVM-H v6.3capi]] ==		== [[CVM-H v6.3capi]] ==