Aftershock activity of the 2011 off the Pacific coast of Tohoku earthquake and the 2011 off Ibaraki earthquake revealed by CMT inversion using dense short period OBS array

Lina Yamaya1, Kimihiro Mochizuki2, Takeshi Akuhara2, Shunsuke Takemura2, Masanao Shinohara2 and Tomoaki Yamada2, (1)National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan, (2)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan