Determination of Sedimentary Thickness in the Shillong plateau by Microseisms
The observed periods of microseisms of land origin recorded by short period Benioff seismograph at Shillong are used in an effort to make and estimate of the low velocity superficial sedimentary rock thickness in the Shillong plateau. The estimate of thickness of the sedimentary layer if verified by some direct methods will provide an answer for the hypothesis that microsesmic periods are dependent on the structure of the crust. The use of period characteristics on account of microseisms of land origin has a superiority over the use of microseisms of sea origin because the structure of the sedimentary crust in a continental area could be explored with much certainty as compared to the structure of the sea bed under the oceans.
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