CHARACTERISTICS OF SITE RESPONSE AROUND K-NET ANAMIZU STATION

Abstract

During the 2007 Noto-Hanto Earthquake, a damage distribution in Anamizu town was not uniform. Some reports discussed a relationship between the damage distribution and the shallow subsurface structure up to approximately 20m depth. We numerically simulate the site response of the shallow subsurface structure around K-NET Anamizu station, where we revealed the detailed structure. The amplification of ground motions mainly depends on the depth of the layer boundary beneath the reference site. For the simulation of mainshock, PGV at the site located 50m away from the K-NET station is about 80% of the observed PGV at the K-NET station, and the simulated engineering shear strain for the horizontal component is about 0.2% at a maximum.