Eric M Dunham, Stanford University, Geophysics, Stanford, CA, United States, Kali L Allison, University of Maryland College Park, College Park, United States, Yuyun Yang, Stanford University, ICME, Stanford, CA, United States, Weiqiang Zhu, Stanford University, Department of Geophysics, Stanford, CA, United States and Kenneth Duru, Australian National University, Canberra, Australia