Rayleigh Waves in a Multi-Layered Medium with Applications to Microseisms
Rayleigh Waves in a Multi-Layered Medium with Applications to Microseisms
复制标题
多层介质中的瑞利波及其在微震中的应用
DOI：
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发表时间：
1957
期刊：
影响因子：
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通讯作者：
M. Mitra
中科院分区：
文献类型：
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作者：
M. Mitra
摘要本文分析了Rayleigh波在以水为最上层的多层介质中的传播，由此可以得到Rayleigh波在海洋路径中的群速度和相速度。海洋路径由两层组成，每一层的成分均匀，厚度有限，下面是延伸到大深度的超基性岩。所得结果已应用于与气旋和“西北风”有关的脉动分析。已经表明，在不同台站记录到的微震的周期主要取决于大陆架的结构。本文件所获得的结果与记录到的与旋风有关的微地震的性质及其变化相比较，提供了有关海底深度和结构的有用信息。
Summary. An analysis is presented for the propagation of Rayleigh waves in a multi-layered medium with water as the uppermost layer from which it is possible to obtain the group velocity as well as the phase velocity for the Rayleigh waves in an oceanic path with the ocean bed consisting of two upper layers each of uniform composition and finite thickness, underlain by ultrabasic rock extended to large depths. The results have been applied in the analysis of microseisms associated with cyclones and “norwesters”. It has been shown that the period of the microseisms recorded at different stations depends critically on the structure of the continental shelf. The results obtained in the present paper, when compared with the nature of the recorded microseisms associated with cyclones, and their variations, give useful information about the depth and structure of the ocean beds.