Abstract
Huge damages occurred along the Pacific coast of Tohoku by the 2011 off the Pacific coast of Tohoku earthquake. The preliminary results on submarine investigations after the earthquake indicate the wide distribution of the event deposits by the earthquake and/or its related tsunami. Characterization of the event deposits and consideration of their depositional processes is very important to understand what happen at sea floor by the particular earthquake, and to recognize the past earthquake- and/or tsunami-induced offshore deposits. Therefore, sedimentological and geological investigations at the offshore of Sanriku-Sendai coast from coastal shallow water to the Japan Trench should be conducted to clarify the depositional processes and temporal changes of the event deposits. Integration of results of the investigations with the simulation and experimental studies is also important.
