Affiliation: | Mingbo Yang 1,2,3,Yuehu Kang 1 , Qing Zhang 4 1 Institute of Geographic Sciences , Natural Resource Research,Chinese Academy of Sciences,Beijing 100101,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Earthquake Administration of Beijing Municipality,Beijing 100080,China 4 Beijing Beifang Middle School,Beijing 100022,China |