Stress Drops for Oceanic Crust and Mantle Intraplate Earthquakes in the Subduction Zone of Northeastern Japan Inferred from the Spectral Inversion Analysis

Hongjun Si1,2, Kazuya Ishikawa3, Tatsuro Arai3 and Rami Ibrahim2, (1)Earthquake Research Institute, University of Tokyo, Tokyo, Japan, (2)Seismological Research Institute Inc., Tokyo, Japan, (3)Civil & Architectural Engineering Dept., Tohoku-Electric Power Co., Inc., Sendai, Japan