• 责任者：Chen Shunyun (State Key Laboratory of Earthquake Dynamics ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Liu Peixun
• 刊名：Seismology and Geology
• 出版年：2013
• 卷期：35(3)
• 关键词：地震前兆 ; precursor ; 地温梯度 ; geothermal gradient ; 四川 ; Sichuan Province
• 页码：p.634-640
• 图表：3 illus., 5 refs.
• 分类号：0500
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

     Recently,the strong earthquakes in China mainland occurred mainly around the Bayanhar block. It is important to monitor the information of ongoing crustal activity at the key tectonic positions. We have developed a set of wireless equipment for measuring the ground temperature in field, and have es- tablished a network of measurement of the ground temperature along Xianshuihe Fault. Some changes of temperature were observed before and after the Lushan earthquake on April 20,2013. First of all, an apparent and persistent change of the ground temperature in Kangding appeared,starting from January 31,2013. This temperature variation corresponded with the occurrence of the small earthquakes around the observation station. According to the relationship between the temperature and stress, the abrupt change of ground temperature is essentially the geological stress adjustment. From the viewpoint of ge- ological structures, both Longmengshan Fault and Xianshuihe Fault are the boundary faults of the Bay- anhar block, but located at different boundaries, so, Kangding in Xianshuihe Fault is tectonically relat- ed to Lushan in Longmengshan Fault. Thus,the temperature change described above would possibly be the precursor of the Lushuan earthquake.