CVM-S5

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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.

Material Properties Below 50km

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.

Usc500km.png Perris500km.png

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

Cvms5 horizontal 0 gtl.png Cvms5 horizontal 100 gtl.png
Cvms5 horizontal 200 gtl.png Cvms5 horizontal 300 gtl.png
Cvms5 horizontal 400 gtl.png Cvms5 horizontal 500 gtl.png

Depth Profiles

Surface Profiles

Del Amo -118.09624, 33.84822
Delamo cvms5.png
Diablo Canyon -120.85611, 35.21083
Diablocanyon cvms5.png
PERRIS -117.24904, 3380594
Perris cvms5.png
USC -118.286, 34.0192
Usc cvms5.png

60km Profiles

Del Amo -118.09624, 33.84822
Delamo cvms5 60km.png
Diablo Canyon -120.85611, 35.21083
Diablo canyon cvms5 60km.png
PERRIS -117.24904, 3380594
Perris cvms5 60km.png
USC -118.286, 34.0192
Usc cvms5 60km.png


CVM-S5 0m to 500m no GTL

Cvms5 horizontal 0 nogtl.png Cvms5 horizontal 100 nogtl.png
Cvms5 horizontal 200 nogtl.png Cvms5 horizontal 300 nogtl.png
Cvms5 horizontal 400 nogtl.png Cvms5 horizontal 500 nogtl.png


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