ETH Zurich, Swiss Seismological Service (SED), Department of Geophysics, ETH Zurich, Zurich, 8093, Switzerland
University of Colorado at Boulder, Department of Aerospace Engineering Sciences, University of Colorado, Boulder, CO 80309, United States
National Geodectic Survey / NOS NOAA, Geosciences Research Division National Geodetic Surcey / NOS / NOAA 325 Broadway St. E/GC2, Boulder, CO 80305, United States