New Mexico State University, Department of Physics, MSC 3D PO Box 30001, Las Cruces, NM 88003-8001, United States
Yale University, Department of Geology and Geophysics, Kline Geology Laboratory, Room 207, 210 Whitney Avenue, New Haven, CT 06511, United States ; New Mexico State University, Department of Physics, MSC 3D PO Box 30001, Las Cruces, NM 88003-8001, United States
New Mexico State University, Department of Physics, MSC 3D PO Box 30001, Las Cruces, NM 88003-8001, United States