川西地震强化监视区的基本情况与工作设想

Basic situation and work proposal of the Western Sichuan Strengthened Monitoring Region on Earthquake

川西地震强化监视区属于计划建立的中国内地首批5个地震强化监视区之一。在初步方案中,该区沿川滇活动地块的东北—东部边界的一部分展布,区内有鲜水河断裂中—南段,安宁河、则木河以及大凉山等活动断裂,总面积约为6万平方千米。本文着重介绍了川西地震强化监视区的基本情况、历史与现今强震活动背景、中长期地震潜势、现有的工作基础和监测能力。最后,作者提出在该区开展强化监测工作的建议,以及与该区中期—短期震情跟踪和预报实践紧密相关的研究课题。

The Western Sichuan Strengthened Monitoring Region on Earthquake is one of the earthquake strengthenedmonitoring regions that are planning to be built first on the Chinese mainland.In the preliminary scheme,the region covers parts of the northeastern and eastern boundaries of the SichuanYunnan active tectonic block,that are made up of the southeastern portion of the Xianshuihe fault,the Anninghe fault,the Zemuhe fault,and has a total area of about 60,000 km2.This paper focuses on the topics such as basic situation,background of historical and current strongearthquake activities,midlong term seismic potential,as well as the work foundation and monitoring ability at present of the Western Sichuan Strengthened Monitoring Region on Earthquake.Finally,the author puts earthquake monitoring in the region and proposals for research projects related closely to the practice of the midshort term prediction and the risk situation tracing for the coming earthquake.