*Savage Martha¹、Graham Kenny¹、Aoki Yosuke²、Arnold Richard¹、Okada Tomomi³、Iio Yoshihisa⁴、Matsumoto Satoshi⁵ (1.Victoria University of Wellington、2.Earthquake Reserach Institute, University of Tokyo、3.Tohoku University, Sendai 980-8578, Japan、4.Kyoto University, Uji 611-0011, Japan、5.Kyushu University, 2-5643-29 Shin'yama, Shimabara, Nagasaki, 855-0843, Japan)