Study on Propagation Characteristics of Rayleigh Wave in Vertical Low-Velocity Zone
详细信息
- 责任者：Zhang Dazhou (School of Geosciences and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Yang Dongluo
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2013
- 卷期：35(3)
- 关键词：瑞雷波法 ; Rayleigh wave methods ; 正演模拟 ; forward modelling
- 页码：p.253-257
- 图表：illus., 15 refs.
- 分类号：1600
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
摘要
In order to study propagation characteristics of the Rayleigh wave in transverse non-homogeneous media,the vertical low-velocity zone models with different width and depth were simulated by Rayleigh wave filed forward modeling according to the staggered grid high-order finite difference method.The numerical results show that surface wave can produce reflection and transmission when it meet transverse non-homogeneous media,and then the location and the width of the low-velocity zone can be determined from the wave field recording.The depth of vertical low-velocity zone will directly affect whether to produce high order surface wave,with the increase of the width of the exposed surface of the vertical low-velocity zone,The energy of high order surface wave is gradually strengthened.