David R Shelly, U.S. Geological Survey, Geologic Hazards Science Center, Golden, CO, United States, Katherine Murphy Whidden, University of Utah, Salt Lake City, UT, United States, Kristine L Pankow, Univ Utah, Salt Lake City, UT, United States, Jacob I. Walter, University of Oklahoma Norman Campus, Norman, OK, United States, Xiaowei Chen, WHOI, Woods Hole, MA, United States; University of Oklahoma Norman Campus, School of Geosciences, Norman, OK, United States, Kevin Mayeda, Air Force Technical Applications Center Patrick AFB, Patrick AFB, FL, United States and William R Walter, Lawrence Livermore Lab, Livermore, CA, United States