1. The Hildebrand Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
2. Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
3. Department of Geosciences, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061, United States
4. Computer, Computational, and Statistical Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States