摘要
川滇地区乾宁至东川段的强震活动长期列为重点监视目标。本文概要分析了研究段的构造和地震活动环境与区域地震活动关系等之后,对该段的强震活动进行了详细的研究,指出该段强震主要集中于乾宁—石棉、冕宁—西昌及宁南—东川三个区域,未来最大震级可达6～7级。1995年前后可能出现6级以上强震活动过程。作为监视,更应注意乾宁—石棉间。本研究,有助于提高对该区地震危险性的判定能力。
The activity of strong earthquakes of segment from Qianning to Dongchuan in Sichuan and Yunnan region has long been the major seismic monitoring objective. Based on analysis of outline of environments of geological structure and seismicity of the studied segment and the relations to regional seismicities, it has made a deep-going investigation on the strong earthquake activity of this segment. It has shown that the active localities of strong earthquakes mainly concentrate upon three areas: between Qianning and Shimian, between Mianning and Xichang, and from Ningnan to Dongchuan. The maximum magnitude of the future events might range between 6 and 7. A active process of strong earthquakes would be around the year of 1995. It should pay more attention to the area between Qianning and Shimian for monitoring in Sichuan region.this study would be conductive to increase the ability of judging seismic risk.
出处
《四川地震》
1992年第2期28-34,共7页
Earthquake Research in Sichuan
关键词
地震
强震
活动性
构造环境
seismicity, structure environment, risk area
