Estimation of Subsurface Structure and Characteristics of Ground Vibration Based on Microtremor and Seismic Observation in the Central Tottori Prefecture, Japan

Abstract

Subsurface structures and characteristics of ground vibration were investigated by analysis of microtremor and seismic data in the central Tottori prefecture, Japan. Subsurface structures were estimated using horizontal-to-vertical spectral ratio (H/V) due to microtremor and seismic data. In addition, we compared a distribution of building damage and characteristics of microtremor H/V. We read the dominant period and classified the categories of shape of H/V to investigate the characteristics of microtremor. As a result, it was found that a difference of the subsurface structure depth to engineering bedrock and a short period component of predominant period less than 1 seconds may have influenced structural damage.