[SCG58-P04] Activities of low frequency tremors in Sanriku-Oki before the 2011 Tohoku-Oki earthquake
*Hidenobu Takahashi1, Ryota Hino1, Naoki Uchida1, Kazuaki Ohta2, Masanao Shinohara3, Ryosuke Azuma1, Susumu Kawakubo1 (1.Graduate school of Science Tohoku University , 2.National Research Institute for Earth Science and Disaster Resilience, 3.Earthquake Research Institute, the University of Tokyo)