Love wave dispersion: A comparison of results for a semi-infinite medium with inhomogeneous layers and for its approximation by homogeneous layers |
| |
| Authors: | S N Bhattacharya |
| |
| Institution: | (1) Seismological Observatory, India Meteorological Department, Lodi Road, 110003 New Delhi, India;(2) Present address: India Meteorological Department, Mohanbari Airfield, 786012 Dibrugarh, Assam, India |
| |
| Abstract: | Love wave dispersion in various semi-infinite media consisting of inhomogeneous layers is discussed. The phase and group velocities are computed when shear wave velocity and density in each inhomogeneous layer are varying exponentially with depth. At the beginning one or two inhomogeneous layers over a homogeneous semi-infinite medium are considered. The dispersion results for these structures are compared with those for their approximations with homogeneous layers. Comparisons show that differences of phase and group velocities for the original models from those for their approximated models (i) increase with the increase of wave number and (ii) are larger for group velocity than for phase velocity. The difference is approximately proportional to the rate of change of parameters in the layers. Finally, dispersion curves are obtained for model IP3MC, which consists of many inhomogeneous and homogeneous layers over a homogeneous semi-infinite medium. The results are compared with the observed group velocity data across the Indian Peninsula. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
