Sarah E Minson¹, Julian Bunn², Elizabeth S Cochran³, Deborah Lyman Kilb⁴, Jessie K Saunders¹, Grace Alexandra Parker¹, Annemarie Baltay¹, Mitsuyuki Hoshiba⁵ and Yuki Kodera⁶, (1)U.S. Geological Survey, Menlo Park, CA, United States, (2)California Institute of Technology, Pasadena, CA, United States, (3)Earthquake Science Center, U.S. Geological Survey, Pasadena, CA, United States, (4)Scripps Institution of Oceanography, La Jolla, CA, United States, (5)Meteorological Res. Inst./JMA, Tsukuba, Japan, (6)Meteorological Research Institute, Japan Meteorological Agency, Ibaraki, Japan