Centre for the Observation and Modelling of Earthquakes and Tectonics, Department of Earth Sciences Oxford University Parks Road, Oxford, OX4 7GR United Kingdom
USGS, EROS Data Center, SAIC 47914, 252nd St., Sioux Falls, SD 57196 United States
USGS, Earthquake Hazards Program 345 Middlefield Road, Menlo Park, CA 94025 United States