Center for Embedded Network Sensing Computer Science Department University of California Los Angeles, 420 Westwood Plaza 3563 Boelter Hall, Los Angeles, CA 90095,
Department of Earth and Space Sciences University of California Los Angeles, 595 Charles Young Drive East, Los Angeles, CA 90095,
California Institute of Technology Division of Geological & Planetary Sciences, MS 252-21 Seismo Lab Caltech, Pasadena, CA 91125,
Department of Earth and Space Sciences University of California Los Angeles, 595 Charles Young Drive East, Los Angeles, CA 90095,