Tsunami deposits found at Agawanuma, Miyagi, Japan

Abstract

We surveyed tsunami sediments at the Agawa-Numa Pond Miyagi, Japan. The pond was attacked by large tsunami wave occurred the 11 March Tohoku-Oki Earthquake (Mw 9.0). Measured tsunami height near the pond changes from 2 to 12 meters (Haraguchi and Iwamatsu, 2011). Thickness of tsunami sediment ranges from 5 to 17 centimeters. This study is useful to reconstruct past tsunami height from sediments which are found in lakes and marshes along the another subduction zone, such as Kuril trench.