张希, 唐红涛, 李瑞莎, 贾鹏. 青藏高原东缘构造活动整体加速与2013~2014年强震成组活跃关联分析[J]. 武汉大学学报 ( 信息科学版), 2017, 42(7): 975-981. DOI: 10.13203/j.whugis20150058
引用本文: 张希, 唐红涛, 李瑞莎, 贾鹏. 青藏高原东缘构造活动整体加速与2013~2014年强震成组活跃关联分析[J]. 武汉大学学报 ( 信息科学版), 2017, 42(7): 975-981. DOI: 10.13203/j.whugis20150058
ZHANG Xi, TANG Hongtao, LI Ruisha, JIA Peng. Analysis on the Relationship Between Overall Acceleration of Tectonic Activities and Group Strong Earthquakes During 2013~2014 at the Eastern Margin of Qinghai-Tibet Plateau[J]. Geomatics and Information Science of Wuhan University, 2017, 42(7): 975-981. DOI: 10.13203/j.whugis20150058
Citation: ZHANG Xi, TANG Hongtao, LI Ruisha, JIA Peng. Analysis on the Relationship Between Overall Acceleration of Tectonic Activities and Group Strong Earthquakes During 2013~2014 at the Eastern Margin of Qinghai-Tibet Plateau[J]. Geomatics and Information Science of Wuhan University, 2017, 42(7): 975-981. DOI: 10.13203/j.whugis20150058

青藏高原东缘构造活动整体加速与2013~2014年强震成组活跃关联分析

Analysis on the Relationship Between Overall Acceleration of Tectonic Activities and Group Strong Earthquakes During 2013~2014 at the Eastern Margin of Qinghai-Tibet Plateau

  • 摘要: 利用截止2014年底全国主要构造区跨断层流动形变资料,通过断层形变异常时空演变分析、特征强度指标计算,参考GPS速度场结果,寻找与2013~2014年青藏高原东缘芦山、岷县漳县、鲁甸、景谷Ms6.5~7.0级强震成组活跃可能有关的大区域构造活动变化背景及短期前兆异常。结果表明,2013~2014年强震成组活跃很可能与2010年以来青藏高原东缘构造活动整体性加速有关;位于测区内的芦山Ms7.0级和岷县漳县Ms6.6级地震,短期前兆异常显著;而位于测区外围的鲁甸Ms6.5级和景谷Ms6.6级地震,短期前兆异常相对偏弱。

     

    Abstract: We use the data of mobile across-fault deformation at main tectonic areas in China up to the end of 2014, aided by analysis on time-space evolution for anomalies of fault deformation and the index of feature intensity and the result of GPS velocity field, to search the variation background of tectonic activities in large area and short-term precursor anomalies, possibly being related to the activities of strong earthquakes such as Lushan, Minxian-Zhangxian, Ludian and Jinggu Ms 6.5~7.0 earthquakes during 2013~2014 at the eastern margin of Qinghai-Tibet plateau. The results show that, ① this group strong earthquakes during 2013~2014 possibly had relationship with the general accelerating of tectonic activities at the eastern margin of Qinghai-Tibet plateau. ② Lushan Ms 7.0 and Minxian-Zhangxin Ms 6.6 earthquakes were located inside this monitoring area, reflecting obvious short-term precursor anomalies; But Ludian Ms 6.5 and Jinggu Ms 6.6 earthquakes outside this monitoring area reflected weaker short-term precursor anomalies.

     

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