Pathikrit Bhattacharya, Indian Institute of Technology Bhubaneswar, School of Earth, Ocean and Climate Sciences, Bhubaneswar, India, Allan M Rubin, Princeton University, Princeton, NJ, United States, Terry E Tullis, Brown University, DEEPS, Providence, RI, United States, Nicholas M Beeler, USGS Cascades Volcano Observatory, Vancouver, WA, United States and Keishi Okazaki, Brown University, Providence, RI, United States