Xuehui Wei, Shanghai, China, Jung-Fu Lin, The University of Texas, Austin, Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States, Dongzhou Zhang, Caltech-Seismolab, Pasadena, CA, United States, Haozhe Liu, HIT Harbin Institute of Technology, Harbin, China and Takuo Okuchi, Okayama University, Okayama, Japan