1. University of Chicago, Department of Geophysical Sciences, 5734 South Ellis Avenue, Chicago, Illinois 60637, claireddoody@gmail.com
2. U.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010
3. KBRwyle, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010
4. Also at U.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010.