新丰江及龙滩水库地震活动性研究  

A Study on Seismic Activity of Longtan and Xinfengjiang Reservoirs

作　　者：陈翰林[1] 陈阳[1] 

机构地区：[1]中国地震局地震预测研究所,北京100036

出　　处：《华南地震》2012年第B11期96-102,共7页South China Journal of Seismology

基　　金：国家科技支撑子专题(2008BAC38B02-01-03)

摘　　要：水库诱发地震的地震活动特征与地震定位研究是开展水库地震研究及危险性评估的重要基础。结合新丰江及龙滩水库的蓄水过程研究讨论了新丰江及龙滩水库的地震活动性,利用2009～2010年在新丰江及龙滩库区架设的加密台站以及两水库原有的观测台站组成的观测台阵记录到的连续观测地震波形,通过结合了波形互相关技术的双差定位法做了地震精定位研究。研究结果证明利用波形互相关技术提取的互相关数据改良了地震定位结果,精定位后震中分布更为集中,与库水分布及周围断裂的分布一致,震源深度也有所收敛,希望该方法推广到今后的水库地震研究中去。Studies on reservoir-induced seismic activity and earthquake location are important foundations for reservoir earthquake research and hazard assessment. In this paper, we discussed seismic activity of Longtan and Xinfengjiang reservoirs, combined with reservoir impoundment process. Using seismic waveforms observed by observation array consisted of intensive observation stations and original observation stations around Longtan and Xinfengjiang reservoirs from 2009 to 2010, we relocated earthquake location by double difference relocation with waveform cross- correlation method. Research results show that waveform cross-correlation data by cross- correlation method improved earthquake positioning, epicenter distribution was more concentrated and more consistent with reservoir distribution and fracture distribution around reservoirs, focal depth is also somewhat convergent. I hope this method will be applied to studies on reservoir earthquakes in the future.

关 键 词：水库地震 地震精定位 双差定位法 波形互相关 

分 类 号：P315.76[天文地球—地震学]