1. 1Qinghai Earthquake Agency, Xining, Qinghai 810001, China
2. 2State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
3. 3Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA
4. 4Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736202, China
5. 5Xi’an Research Institute, China Coal Technology and Engineering Group, Xi’an, Shaanxi 710054, China
6. 6Key Laboratory of Earthquake Predication, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China
7. 7University of Chinese Academy of Sciences, Beijing 100049, China