1. Institut de Physique du Globe de Strasbourg (UMR 7516 CNRS), EOSTUniversité de Strasbourg Strasbourg France
2. State Key Laboratory of Earthquake Dynamics, Institute of GeologyChina Earthquake Administration Beijing China
3. Department of GeosciencesState University of New York Stony Brook New York USA
4. Earth System Science Programme, Faculty of ScienceThe Chinese University of Hong Kong Hong Kong