STUDY ON RISK EVALUATION METHOD FOR GROUND SHAKING HAZARD BY MICROTREMOR OBSERVATION

Abstract

 In this study, microtremor observation was carried out for local governments where the natural disasters caused by multiple origins such as earthquake shaking and tsunami were worried, and the sedimentary structure of the ground was estimated by the predominant period and the corresponding peak amplitude of microtremor H/V spectral ratio. In addition, we proposed the risk evaluation method of ground shaking hazard and illustrated contour maps for spatial distribution of the evaluated risk. The validity of the risk evaluation scale was verified to compare with integral value of H/V spectral ratio.