*Martha K Savage¹, Kenny Graham¹, Yosuke Aoki², Richard Arnold¹, Tomomi Okada³, Yoshihisa Iio⁴, Satoshi Matsumoto⁵ (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)