1. Department of Geological Sciences, Stanford University, Stanford, CA 94305-2115, USA.
2. Department of Earth and Planetary Science, University of California–Berkeley, Berkeley, CA 94720-4767, USA.
3. Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, USA.
4. Research Center for Integrated Disaster Risk Management (CIGIDEN), Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile.
5. Departamento de Ingeniería Estructural y Geotécnica, Pontificia Universidad Católica de Chile, Macul, Santiago 7820436, Chile.
6. Department of Geosciences, University of Connecticut, Storrs, CT 06269, USA.