GROUND MOTION ESTIMATION IN OYATSU RESIDENTIAL CLUSTER, MASHIKI TOWN, JAPAN, DURING THE MAIN SHOCK OF THE 2016 KUMAMOTO EARTHQUAKE BASED ON HIGH-DENSE MICROTREMOR MEASUREMENTS AND TEMPORARY AFTERSHOCK OBSERVATION

Abstract

 Serious damage of wooden houses was occurred in Oyatsu cluster, Mashiki Town, Japan, during main shock of the 2016 Kumamoto Earthquake. In this study, first, microtremor measurement with high dense spatial location was carried out in the cluster. Next, temporary aftershock observation was conducted in the cluster site in order to evaluate the site amplification and phase effects. Finally, based on the local site effects and the characterized source model, ground motions during the 2016 main shock were estimated. The estimated ground motions are will be useful in the detailed study of the failure mechanism.