Abstract
The 2011 East-Japan Earthquake has caused sand-liquefaction over the long stretch of Tokyo Bay area. Both Konagai laboratory and Aero Asahi Corporation jointly surveyed Urayasu city, one of the heavily liquefied areas, to measure soil subsidence caused by liquefaction. An airborne LIDAR imagery was obtained on April 20th and compared with that before the earthquake. To remove the effect of deep-seated tectonic deformations, end-bearing pile supported buildings were taken as a reference. [This abstract is not included in the PDF]
