On low period sub-oceanic Rayleigh waves and their attenuation |
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| Authors: | Sujit Kumar Bose M Sc |
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| Institution: | (1) Presidency College, Calcutta, (India) |
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| Abstract: | Summary In most cases it is found that Rayleigh waves in the period range I to 12 secs fail to cross appreciable oceanic paths. Several explanations have been given, but none seem very much satisfactory. Here an attempt has been made to show that the attenuation of the Rayleigh waves in the low period range is due to their passage through a non-uniform earth's crust, the non-uniformity arising due to the ocean. The ocean has been taken to be an indentation in a flat earth's crust, with horizontal bottom and slant sides. Approximate numerical calculations hint that the vertical component of displacement is attenuated more than the horizontal component. |
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