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2013年8月12日,西藏自治区左贡、芒康交界发生MS6.1级地震。本文在对此次地震灾区所有房屋建筑进行现场实地调查的基础上,重点分析了本次地震烈度等震线的分布情况,如形状、面积和范围等。同时,在介绍区域地震构造背景的基础上,根据震区活动构造、地震烈度等震线、地震序列、震源机制解结果等综合分析判定,澜沧江断裂带是左贡、芒康交界MS6.1级地震的主要发震构造。本文的初步研究成果不仅可以提高认识当地的发震构造条件,而且还有利于指导当地的抗震设防、防灾减灾等工作。
On August 12, 2013, an MS6.1 earthquake occurred at the junction of Zukun and Mangkang in the Tibet Autonomous Region. Based on the field survey of all the houses and buildings in this quake-stricken area, this paper focuses on the distribution of isoseismic intensity such as shape, area and range of the earthquake. At the same time, on the basis of introducing the tectonic setting of the regional earthquake and according to the synthetical analysis and judgment of the seismic activity seismology, seismic intensity and other seismic lines, earthquake sequences and focal mechanism solution results, the Lancangjiang fault zone is Zugong and Mangkang junction MS6.1 The main seismogenic structure of the earthquake. The preliminary research results of this paper can not only improve the understanding of the local conditions of seismogenic structures, but also help to guide the local seismic fortification, disaster prevention and mitigation work.