*Yasuo Yabe¹, Hiroshi Ogasawara², Takatoshi Ito³, Akio Funato⁴, Raymond Durrheim⁵, Halil Yilmaz⁶, Gerhard Hofmann⁷, Shuhei Abe¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Faculty of Science and Engineering, Ritsumeikan University, 3.Institute of Fluid Science, Tohoku University, 4.Fukada Geological institute, 5.School of Geoscience, University of the Witwatersrand, 6.School of Mining Engineering, University of the Witwatersrand, 7.Anglogold Ashanti)