1. Nevada Seismological Laboratory, University of Nevada Reno, Reno, Nevada, U.S.A.
2. Department of Geological Sciences and Engineering, University of Nevada Reno, Reno, Nevada, U.S.A.
3. Department of Earth and Environment, Boston University, Boston, Massachusetts, U.S.A.
4. Department of Geosciences, University of Tulsa, Tulsa, Oklahoma, U.S.A.
5. Nevada Geodetic Laboratory, Nevada Bureau of Mines and Geology, University of Nevada Reno, Reno, Nevada, U.S.A.
6. Department of Earth Sciences, University of Oxford, Oxford, United Kingdom