摘要
以YRY-4型四元件钻孔应变地震仪的观测资料为基础,结合不同的震例,探讨钻孔应变观测的意义。主要研究的内容有从多年应变的长期信号看地块的稳定与活动性;从各台站潮汐玫瑰图形的时空变化中,寻找我国大陆地质构造运动的特性及力源;通过汶川8级大地震前后,距汶川最近的姑咱地震台记录到的海量应变异常记录,认识大地震的前兆;通过观测数据的自洽与失洽、震前震源区岩层进入不可逆的"亚失稳态"等多方面的深入分析,进一步明确钻孔应变观测的作用。
Based on the observation data of YRY-4 four-element borehole strain seismographs and different earthquake cases,the significance of borehole strain observation is discussed in this paper.The main research contents are as follows:inspecting the stability and activity of the block from the long-term signals of multi-year strain;searching for the characteristics and sources of tectonic movement in the mainland of China from the temporal and spatial variations of tidal rose patterns at various stations;recognizing the precursors of large earthquakes through the records of massive strain anomalies recorded by Guza seismic station,which is nearest to Wenchuan,before and after the Wenchuan Ms8 earthquake;and the self-consistency and inconsistency of observation data,the irreversible meta-instability of the strata in the source area before earthquakes.The role of borehole strain observation is further clarified from the deep analysis in various aspects carried in this study.
作者
池顺良
Chi Shun-liang(Hebi Seismological Bureau,Henan Province,Hebi,Henan 458000,China)
出处
《山西地震》
2019年第1期17-29,共13页
Earthquake Research in Shanxi
关键词
地震前兆
长期信号
潮汐玫瑰图
观测数据
应力状态
Earthquake precursors
Long-term signals
Tidal rose map
Observation data
Stress state