Presenter: Yu-Tse Lin
Date: 2016/11/03
Abstract
In order to understand the data processing of one- dimensional velocity model from Rayleigh wave dispersion, I’ll introduce two kinds of method to get dispersion curves, one is from earthquake event use two-station method, another is from ambient noise use Refraction Microtremor (ReMi) technique. Both of them can get the surface wave phase velocity dispersion from recording data, then establish a initial theoretical model, fit with the estimated model, change the parameters of the estimated model to find out the best Misfit as the final solution. According to the station spacing, shear wave velocity corresponding to the depth of the different scales was resolved, the deepest is 200 km and 80 m respectively. There some factors will affect the result, so these study also consider topography or conducted some test to analysis the impact factor. Depth of big scale can explain the tectonic evolution of lithosphere, and in the small scale can be used in the engineering sector.
Reference
T. Meier, K. Dietrich, B. Stockhert and H.-P. Harjes, 2004. One-dimensional models of shear wave velocity for the eastern Mediterranean obtained from the inversion of Rayleigh wave phase velocities and tectonic implications, Geophys. J. Int. 156, 45–58 doi: 10.1111/j.1365-246
S. Coccia, V. Del Gaudio, N. Venisti and J. Wasowski, 2010. Application of Refraction Microtremor (ReMi) technique for determination of 1-D shear wave velocity in a landslide area, J.Appl. Geophysics. 71 (1), 71–89