*Yukihiro Terada¹, Sin’ichi Yamamoto², Naohiko Iwakiri², Tadahiro Iwasaki³, Naokiyo Koshikawa³, Mitsuo Tada⁴, Akira Wada⁵, Teruyuki Kato⁶ (1.Kochi College, National Institute of Technology, 2.National Institute of Information and Communications Technology, 3.Japan Aerospace Exploration Agency, 4.Yuge College, National Institute of Technology, 5.Hitachi Zosen Corporation, 6.Earthquake Research Institute, The University of Tokyo)