Difference between revisions of "CVM-S5"
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== Material Properties Below 50km == | == Material Properties Below 50km == | ||
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| + | 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. | ||
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Revision as of 19:01, 3 July 2014
Contents
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.
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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
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Depth Profiles
Surface Profiles
Del Amo -118.09624, 33.84822
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Diablo Canyon -120.85611, 35.21083
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PERRIS -117.24904, 3380594
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USC -118.286, 34.0192
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60km Profiles
Del Amo -118.09624, 33.84822
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Diablo Canyon -120.85611, 35.21083
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PERRIS -117.24904, 3380594
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USC -118.286, 34.0192
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CVM-S5 0m to 500m no GTL
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