Smoothed basin velocity structure model of the Kanto Sedimentary Basin (Takemura et al., 2015)
- 1. Earthquake Research Institute, the University of Tokyo
- 2. Yokohama City University
Description
Model description
We constructed sedimentary S-wave velocity structure model of the Northern Kanto region using 190 local S-wave velocity structures. In the uploaded files of Takemura2015_V0..dat and Takemura2015_Alpha.dat, longitudes, latitudes and values of \(V_0\) (and \(\alpha\)) at 190 local points are listed. Our model of the sedimentary basin was described by two parameters of a simple velocity gradient function (Ravve and Koren 2006). The depth gradient function is described as
\(V_S(z)=V_0+\Delta V\left[1-\exp\left(-\frac{\alpha z}{\Delta V}\right)\right]\)
where \(V_0\) is the S-wave velocity at the surface (z = 0), \(\Delta V\) is S-wave velocity of the bedrock (3.2 km/s), and \(\alpha\) is the positive constant that determines the velocity-depth gradient.
3D sedimentary model construction
After applying GMT surface to each parameter, spatial variations of both two parameters were obtained. Using obtained spatial distributions of \(V_0\) and \(\alpha\) and the depth gradient function, 3D sedimentary velocity structure of the Northern Kanto region could be constructed.
Citation
Takemura, S., Akatsu, M., Masuda, K., Kajikawa, K., & Yoshimoto, K., (2015), Long-period ground motions in a laterally inhomogeneous large sedimentary basin: observations and model simulations of long-period surface waves in the northern Kanto Basin, Japan, Earth, Planets and Space, 67:33, doi:10.1186/s40623-015-0201-7
Files
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Additional details
References
- Takemura, S., Akatsu, M., Masuda, K., Kajikawa, K., & Yoshimoto, K., (2015), Long-period ground motions in a laterally inhomogeneous large sedimentary basin: observations and model simulations of long-period surface waves in the northern Kanto Basin, Japan, Earth, Planets and Space, 67:33, doi:10.1186/s40623-015-0201-7