DEFORMATION OF SADY BEACH AND INUNDATION ON IWAMA-SANUKA COAST IN FUKUSHIMA PREFECTURE DUE TO THE 2011 GREAT TSUNAMI

Abstract

 A massive earthquake with a magnitude of 9.0 occurred on March 11, 2011, at 14:46 with an epicenter 130 km offshore of Oshika Peninsula in Miyagi Prefecture. After the earthquake, a large tsunami was generated owing to the abrupt crustal subsidence and elevation and inundated east Japan's coastline. We carried out field observations to investigate the deformation of the previous river mouth bar by the comparison of oblique photographs as well as the investigations of the damage of the seawalls and tsunami inundation depth on the Iwama-sanuka coast, located north of the Same River in the southern Fukushima Prefecture. The results of the field observations on the deformation of sandy beach and the inundation of the Iwama-sanuka coast were reported.