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1.前言1986年8月26日,青海省门源县境内发生了6.4级地震。地震发生后,青海省地震局与兰州地震研究所联合对震区进行了宏观考察。但由于自然条件所限,未能进入极震区。在这以后,青海省地震局、兰州地震研究所、青海省地质局联合组队,再次深入震区进行考察,确定了宏观震中及地震裂缝带,圈划了极震区等震线。本文主要以第二次考察所取得的资料为基础,论述和分析了这次地震极震区的地质震害类型和分布特征以及烈度分布特征。
1. Introduction On August 26, 1986, a magnitude 6.4 earthquake occurred in the county of Menyuan, Qinghai Province. After the earthquake, the Seismological Bureau of Qinghai Province and Lanzhou Institute of Earthquake jointly conducted a macro survey of the earthquake area. However, due to natural conditions, unable to enter the earthquake zone. After that, Qinghai Seismological Bureau, Lanzhou Institute of Seismology and Qinghai Provincial Bureau of Geology jointly formed a team to conduct an in-depth investigation of the earthquake zone to confirm the macro epicenter and the seismic fracture zone, and to circle the isochron and other seismic lines. Based on the data obtained from the second survey, this paper discusses and analyzes the types and distribution features of earthquake damage and the distribution of intensity distribution in the earthquake-prone area.