CVM-S4.26 - Revision history

Maechlin at 23:57, 2 November 2016

2016-11-02T23:57:50Z

Maechlin at 23:56, 2 November 2016

2016-11-02T23:56:46Z

Maechlin at 23:53, 2 November 2016

2016-11-02T23:53:40Z

Maechlin: Created page with '== Community Velocity Model - SCEC 5 == CVM-S5 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model a…'

2016-01-28T06:15:11Z

Created page with '== Community Velocity Model - SCEC 5 == CVM-S5 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model a…'

New page

== Community Velocity Model - SCEC 5 ==

CVM-S5 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model as well as an optional GTL implementation. Please note that unlike CVM-S4.26, CVM-S5 does not "merge" the results of the inversion with an underlying velocity model. Therefore it is strictly the 26th iteration dataset, 500m resolution, tri-linearly interpolated. There is no background model included, although UCVM can tile a background 1D model should the user specifically ask for it.

== CyberShake Histogram Plots ==

=== Vs30 at CyberShake Sites ===

{|
|[[File:Cvms5_vs30.png|500px]]
|[[File:Cvms4_vs30.png|500px]]
|-
|[[File:Cvmh_vs30.png|500px]]
|}

=== Z1.0 at CyberShake Sites ===

{|
|[[File:Cvms5_z10.png|500px]]
|[[File:Cvms4_z10.png|500px]]
|-
|[[File:Cvmh_z10.png|500px]]
|}

=== Z2.5 at CyberShake Sites ===

{|
|[[File:Cvms5_z25.png|500px]]
|[[File:Cvms4_z25.png|500px]]
|-
|[[File:Cvmh_z25.png|500px]]
|}

== Material Properties Below 50km ==

The image below shows depth profiles for all CyberShake sites plotted onto one image. The depth goes from 0km to 500km.

[[File:Cvms4_vs_cybershake_500km.png|500px]]

In the two images below, CVM-S5 is in red and CVM-S4 is in blue. Currently, CVM-S5 returns the material properties at 50km for all depths below 50km.

{|
|[[File:usc500km.png|500px]]
|[[File:perris500km.png|500px]]
|}

== Attenuation Relationship ==

Attenuation is based off of Olsen et al., 2003 and is calculated as follows:

If Vs < 1500: 
    Qs = Vs * 0.02 
Else: 
    Qs = Vs * 0.10

Qp = Qs * 1.5

== Density Based on Vs ==

According to Po Chen:

"The Vs-density relation was obtained from Table 1 in Brocher 2005. In that table, the 3rd column is Vs and the 5th column is density. So I did a regression using data from these two columns and obtained a polynomial relation for Vs-density. Those numbers in that data file are the coefficients of the polynomial."

The actual polynomial is:

1.2948318548300342 + 1.2550758337054457Vs - 0.51231936640441489Vs2 + 0.051962399479341816Vs3 + 0.015600987888334450Vs4 - 0.0024189659303912917Vs5

== Initial Plots ==

=== CVM-S5 0m to 500m with GTL ===

{|
|[[File:Cvms5_horizontal_0_gtl.png|500px]]
|[[File:Cvms5_horizontal_100_gtl.png|500px]]
|-
|[[File:Cvms5_horizontal_200_gtl.png|500px]]
|[[File:Cvms5_horizontal_300_gtl.png|500px]]
|-
|[[File:Cvms5_horizontal_400_gtl.png|500px]]
|[[File:Cvms5_horizontal_500_gtl.png|500px]]
|}

=== Depth Profiles ===

==== Surface Profiles ====

{|
|Del Amo -118.09624, 33.84822 [[File:delamo_cvms5.png|500px]]
|Diablo Canyon -120.85611, 35.21083 [[File:diablocanyon_cvms5.png|500px]]
|-
|PERRIS -117.24904, 3380594 [[File:perris_cvms5.png|500px]]
|USC -118.286, 34.0192 [[File:usc_cvms5.png|500px]]
|}

==== 60km Profiles ====

{|
|Del Amo -118.09624, 33.84822 [[File:delamo_cvms5_60km.png|500px]]
|Diablo Canyon -120.85611, 35.21083 [[File:diablo_canyon_cvms5_60km.png|500px]]
|-
|PERRIS -117.24904, 3380594 [[File:perris_cvms5_60km.png|500px]]
|USC -118.286, 34.0192 [[File:usc_cvms5_60km.png|500px]]
|}

=== CVM-S5 0m to 500m no GTL ===

{|
|[[File:Cvms5_horizontal_0_nogtl.png|500px]]
|[[File:Cvms5_horizontal_100_nogtl.png|500px]]
|-
|[[File:Cvms5_horizontal_200_nogtl.png|500px]]
|[[File:Cvms5_horizontal_300_nogtl.png|500px]]
|-
|[[File:Cvms5_horizontal_400_nogtl.png|500px]]
|[[File:Cvms5_horizontal_500_nogtl.png|500px]]
|}

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

@@ Line 4: / Line 4: @@
 == Naming Convention ==
-At some point in the past, CVM-S4.26 was renamed to CVM-S5. However, this name has led to confusion. So we have reverted to the original names. CVM-S4.26 are the unmodified tomography results. CVM-S4.26.M01 is a version of CVM-S4.26 that add a geotechnical information from the original CVM-S4. At this time, SCEC has not released a CVM-S5 model.
+At some point in the past, CVM-S4.26 was renamed to CVM-S5. However, this name has led to confusion. So we have reverted to the original names. CVM-S4.26 is the unmodified tomography result from En-Jui Lee and Po Chen.
 == CyberShake Histogram Plots ==

← Older revision		Revision as of 23:56, 2 November 2016
Line 2:		Line 2:

	CVM-S4.26 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model as well as an optional GTL implementation. Please note that unlike CVM-S4.26M01, CVM-S4.26 does not "merge" the results of the inversion with an underlying velocity model. Therefore it is strictly the 26th iteration dataset, 500m resolution, tri-linearly interpolated. There is no background model included, although UCVM can tile a background 1D model should the user specifically ask for it.		CVM-S4.26 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model as well as an optional GTL implementation. Please note that unlike CVM-S4.26M01, CVM-S4.26 does not "merge" the results of the inversion with an underlying velocity model. Therefore it is strictly the 26th iteration dataset, 500m resolution, tri-linearly interpolated. There is no background model included, although UCVM can tile a background 1D model should the user specifically ask for it.
		+
		+	== Naming Convention ==
		+	At some point in the past, CVM-S4.26 was renamed to CVM-S5. However, this name has led to confusion. So we have reverted to the original names. CVM-S4.26 are the unmodified tomography results. CVM-S4.26.M01 is a version of CVM-S4.26 that add a geotechnical information from the original CVM-S4. At this time, SCEC has not released a CVM-S5 model.

	== CyberShake Histogram Plots ==		== CyberShake Histogram Plots ==

@@ Line 1: / Line 1: @@
-== Community Velocity Model - SCEC 5 ==
+== Community Velocity Model - SCEC 4.26 ==
-CVM-S5 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model as well as an optional GTL implementation. Please note that unlike CVM-S4.26, CVM-S5 does not "merge" the results of the inversion with an underlying velocity model. Therefore it is strictly the 26th iteration dataset, 500m resolution, tri-linearly interpolated. There is no background model included, although UCVM can tile a background 1D model should the user specifically ask for it.
+CVM-S4.26 is an improved version of the CVM-S4 velocity model which includes full 3D tomographic improvements to the SCEC 4 velocity model as well as an optional GTL implementation. Please note that unlike CVM-S4.26M01, CVM-S4.26 does not "merge" the results of the inversion with an underlying velocity model. Therefore it is strictly the 26th iteration dataset, 500m resolution, tri-linearly interpolated. There is no background model included, although UCVM can tile a background 1D model should the user specifically ask for it.
 == CyberShake Histogram Plots ==
@@ Line 38: / Line 38: @@
 [[File:Cvms4_vs_cybershake_500km.png|500px]]
-In the two images below, CVM-S5 is in red and CVM-S4 is in blue. Currently, CVM-S5 returns the material properties at 50km for all depths below 50km.
+In the two images below, CVM-S4.26 is in red and CVM-S4 is in blue. Currently, CVM-S5 returns the material properties at 50km for all depths below 50km.
 {|
@@ Line 104: / Line 104: @@
-=== CVM-S5 0m to 500m no GTL ===
+=== CVM-S4.26 0m to 500m no GTL ===
 {|