摘要
利用西影井热水水位和陕西省地震台网的观测资料,研究了西安地区地下热水活动和渭河盆地及邻区地震活动的关系。结果表明,西安地区地下热水活动与区域地震活动的Hurst指数变化趋势十分相似,在地震发生前后,地下热水活动和区域地震活动的Hurst指数均存在"下降—低值—回升"的趋势,西影井水位Hurst指数H值与渭河盆地及邻区地震频次Hurst指数H值具有较强的相关性,相关系数为0.86。研究结果表明,地下热水活动与区域地震活动可能受同一构造力源的控制,由区域应力场改变引发了地下水系统的变形进而导致了岩石孔隙水压力的变化,从而导致了深层地下热水活动和地震活动的异常。
Based on the geothermal water level data of Xiying well and the earthquake data recorded by the seismic network of Shaanxi Province,the relationship between the activity of geothermal water and regional seismic activity is studied. The results show that the changes of the Hurst exponent of geothermal water in Xi＇an area is very similar to the variation of the Hurst exponent of regional seismic frequency in Weihe basin. Before and after the earthquake,the Hurst exponent anomalous features of geothermal water and regional seismic frequency features both behaves as＂dropping-low value-rising＂. The Hurst exponent of geothermal water in Xi＇an area is obviously related to the Hurst exponent of regional seismic frequency,the correlation coefficient is 0. 86. These features indicate that the activity of geothermal water and regional earthquakes are both controlled by the same tectonic force. The variations of the tectonic regional stress field may cause the deformation of the groundwater system and the changes of rock pore water pressure,and cause the anomalies of geothermal water and seismic activity.
作者
王卫东
张钰诚
张永志
郑怡
赵云峰
WANG Wei-dong1, ZHANG Yu-cheng1, ZHANG Yong-zhi1, ZHENG Yi2, ZHAO Yun-feng3(1. College of Geological Engineering and Geomatics of Chang＇an University, Xi ＇an 710054, Shaanxi, China;2. Shaanxi Earthquake Agency, Xi＇an 710068, Shaanxi, China;3. The Second Crust Monitoring and Application Center of China Earthquake administration, Xi＇an 710054,Shaanxi, China)
出处
《内陆地震》
2018年第2期97-102,共6页
Inland Earthquake
基金
中央高校基本科研业务费专项资金(创新团队)(2013G3262012)
国家自然科学基金(41274005)联合资助
