APPLICABILITY OF SEISMIC INTERFEROMETRY TO MICROTREMOR RECORDS FOR TWO DIMENSIONAL S-WAVE VELOCITY STRUCTURE SURVEY

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  • 2次元S波速度構造推定における地震波干渉法の常時微動記録への適用性

Abstract

<p>The applicability of the seismic interferometry was examined for the purpose of establishing a method for investigating the two-dimensional S wave velocity structure. Microtremor records were obtained for 14 hours and 22 hours at two sites with different vibration levels, respectively. The main findings obtained are as follows. </p><p>1. S-wave velocity structures at depths of 20 m or more can be explored, which is difficult to do with existing surface wave surveys. </p><p>2. Phase velocity can be detected in about one hour of measurement by arranging a large number of receiving points in a straight line.</p>

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