1. Institute of GeomechanicsChinese Academy of Geological Sciences Beijing China
2. Department of Earth and Planetary ScienceWashington University St. Louis Missouri USA
3. Department of GeosciencesPennsylvania State University University Park Pennsylvania USA
4. National Institute of Polar Research Tokyo Japan
5. Polar Research Institute in China Shanghai China
6. Institut de Physique du Globe de StrasbourgUniversité de Strasbourg/EOST, CNRS Strasbourg France