YANG Rong1,2， YAN Jun-ping1*
(1 College of Tourism and Environment，Shaanxi Normal University，Xi′an 710062, Shaanxi, China;2 College of Resources and Environment, Ningxia University, Yinchuan 750021, Ningxia, China)
Abstract:
Based on the seismic data(Ms≥5) of Ningxia since 1920, the symmetry and tendency of the earthquake disasters in Ningxia were analyzed and judged by using the methods of commensurability information extraction and Map of Butterfly Structure (MBS). The results showed that the earthquakes (Ms≥5) would be extremely active from 2012 to 2014, and the earthquake signal appeared strongly in 2012. In addition, the year of 2019 may be a high frequency year that the earthquake disaster would happen in Ningxia. The study aimed at enriching case study on the disaster tendency of the symmetry method.
KeyWords:
symmetry； earthquake； tendency； Ningxia
