Numerical Experiments on Determination of Three-Dimensional Velocity Structure

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  • 三次元速度構造を求める数値実験
  • 3ジゲン ソクド コウゾウ オ モトメル スウチ ジッケン

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Abstract

First arrival time data calculated for an artificial velocity model were inverted using the method based on AKI and LEE (1976) under various conditions. The effect of the number and the quality of data, initial values of source locations and origin times and inhomogeneous source distribution were examined through the results of these numerical experiments. The prominent feature of the results are summarized as follows. (i) Results concerning to peripheral blocks are affected more hardly by the change of conditions than those concerning to interior blocks. (ii) It is difficult to know velocities in blocks ajacent to the outer region even if a large number of stations and sources are used.

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