Yixuan Xing, University of Goettingen, Faculty of Geoscience and Geography, Göttingen, Germany, Rui Hu, Hohai University, School of Earth Science and Engineering, Nanjing, China, Hongbiao Gu, Institute of Disaster Prevention, School of Ecology and Environment, Beijing, China, Quan Liu, Georg-August-Universitaet Goettingen, Applied Geology, Göttingen, Germany and Thomas Ptak, Georg August University Goettingen, Goettingen, Germany