Keehoon Kim, Lawrence Livermore National Laboratory, Geophysical Monitoring Program, Livermore, CA, United States, Arthur J Rodgers, Lawrence Livermore Natl Lab, Livermore, CA, United States, Milton A Garces, Infrasound Laboratory, Kailua Kona, HI, United States and Steve Myers, Lawrence Livermore Nat'l Lab, Livermore, CA, United States