STRONG MOTION ESTIMATION IN MIDORIGAOKA, SENDAI CITY, FOR THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE BASED ON EXTENDED SITE EFFECT SUBSTITUTION METHOD

Abstract

 Many landslides occurred in a residential area on embankments in Midorigaoka, Sendai City, during the 2011 off the Pacific coast of Tohoku Earthquake. In this study, to evaluate empirical site amplification and phase effects, aftershock observation was conducted at the damage site. Using the site effects, we estimated the strong ground motions at the damage site during the 2011 main shock based on extended site-effect substitution method considering the contributions of soil nonlinearity and seismological subevents. The estimated waveform will be useful in the detailed study of the mechanism of damage.