1. Institut de Physique du Globe de StrasbourgUniversité de Strasbourg/EOST, CNRS Strasbourg France
2. Seismological LaboratoryCalifornia Institute of Technology Pasadena California USA
3. Now at Ecole Normale Supérieure, Department of GeosciencesPSL Research University Paris France
4. Jet Propulsion LaboratoryCalifornia Institute of Technology Pasadena California USA
5. Canada Centre for Mapping and Earth Observation, Natural Resources Canada Ottawa Ontario Canada
6. Departamento de GeofísicaUniversidad de Chile Santiago Chile
7. Now at U.S. Geological SurveyEarthquake Science Center Menlo Park California USA