Seismic Waveform Evaluation at a Ground Disaster Site - Fusa District, Abiko City, Chiba Prefecture - for the Past Large-scale Earthquakes Based on the Site-effect Substitution Method

Abstract

Serious damage including ground liquefaction occurred at Fusa District, Abiko City during the 2011 off the Pacific coast of Tohoku Earthquake (2011/03/11 14:46 M_W9.0). The site was also affected by the 2011 off Ibaraki Prefecture Earthquake (2011/03/11 15:15 M_J7.6) and the 2011 Hamadori, Fukushima Prefecture, Earthquake (2011/04/11 17:16 M_J7.0). Evaluation of strong ground motions during the past 3 earthquakes at this site with sufficient accuracy is very important to clarify the ground disaster mechanism. In this study, seismic waveforms at this site were estimated based on the site-effect substitution method. The estimated seismic waveforms will be useful in the detailed study of the mechanism of observed ground disaster.