SOIL SUBSIDENCE MAP FOR THE WEST PART OF TOKYO BAY AREA LIQUEFIED IN THE MARCH 11^th, OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE

Abstract

 On March 11th, 2011, a gigantic earthquake of moment magnitude Mw 9.0, which is officially named “The 2011 Off the Pacific Coast of Tohoku Earthquake”, caused severe liquefaction damage over the long stretch of reclaimed lands along the coast of the Tokyo Bay. In response to this earthquake, liquefaction-induced soil subsidence map for the eastern part of Tokyo Bay area was immediately prepared by comparing a set of Digital Surface Models before and after the earthquake, and subtracting tectonic displacement. In this study, soil subsidence map is further extended to cover the west part of Tokyo Bay area and compared with ground subsidence measured just after the earthquake.