1. Institute of Geomechanics, Chinese Academy of Geological Sciences; Beijing China
2. Department of Earth and Planetary Science; Washington University; St. Louis Missouri USA
3. Department of Geosciences; Pennsylvania 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 Strasbourg; Université de Strasbourg/EOST, CNRS; Strasbourg France