Chen Zuo^1,2, David Zhen Yin¹, Zhibin Pan², Emma Mackie³ and Jef Caers¹, (1)Stanford University, Department of Geological Sciences, Stanford, CA, United States, (2)Xi'an Jiaotong University, Faculty of Electronic and Information Engineering, Xi'an, China, (3)Stanford University, Department of Geophysics, Stanford, CA, United States