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地震 ›› 2022, Vol. 42 ›› Issue (4): 127-136.doi: 10.12196/j.issn.1000-3274.2022.04.010

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2021年5月22日青海玛多7.4级地震震害特征与地震烈度分布

徐玮阳, 杨理臣, 杨芳, 殷翔, 李智敏, 姚生海, 马震, 盖海龙, 李鑫   

  1. 青海省地震局, 青海 西宁 810000
  • 收稿日期:2021-06-15 修回日期:2021-09-03 发布日期:2023-03-31
  • 通讯作者: 杨理臣, 高级工程师。 E-mail: 59940544@qq.com
  • 作者简介:徐玮阳(1990-), 男, 甘肃天水人, 工程师, 主要从事地震应急研究。
  • 基金资助:
    青海省地震局2019年地震科学基金项目(2019A05)

Damage Characteristics and Seismic Intensity Distribution of the Qinghai Maduo M7.4 Earthquake on May 22, 2021

XU Wei-yang, YANG Li-chen, YANG Fang, YIN Xiang, LI Zhi-min, YAO Sheng-hai, MA Zhen, GAI Hai-long, LI Xin   

  1. Qinghai Earthquake Agency, Xining 810000, China
  • Received:2021-06-15 Revised:2021-09-03 Published:2023-03-31

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摘要： 2021年5月22日青海玛多7.4级地震对青海省果洛藏族自治州、 海西蒙古族藏族自治州、 玉树藏族自治州以及四川省甘孜藏族自治州造成了不同程度的破坏。 此次地震的突出特点是灾情重, 伤亡轻, 无人员死亡, 房屋倒塌333间, 多为老旧无人居住的土木结构和砖木结构农村辅助用房和牲畜棚圈, 13000多间房屋存在不同程度的损坏, 道路、 桥梁等基础设施破坏严重。 本文通过对此次地震现场55个灾害调查点的震害调查与资料分析, 得到了2021年玛多7.4级地震烈度分布情况, 并对震害特征及原因进行了分析, 地广人稀是造成本次地震震害特点的最主要原因。

关键词: 2021年青海玛多7.4级地震, 地震烈度, 震害特征

Abstract: On May 22, 2021, the M7.4 Qinghai Maduo earthquake caused varying degrees of damage to Guoluo, Haixi and Yushu in Qinghai Province, as well as Ganzi in Sichuan Province. The prominent feature of the earthquake is heavy disaster, less casualties, no deaths, 333 houses collapsed. Most of the collapsed houses are old and uninhabited civil structures and brick and wood structure of rural auxiliary houses and livestock sheds. More than 13000 houses have been damaged to varying degrees. Roads, bridges and other infrastructure are also destroyed seriously. Based on the damage survey and data analysis of 55 disaster investigation points in the earthquake site, this paper expounds the seismic intensity distribution of the 2021 Qinghai Maduo M7.4 earthquake, and preliminarily analyzes the characteristics and causes of the earthquake damage, in which the vast area and sparse population are the main reasons for this earthquake damage features.

Key words: the 2021 Qinghai Maduo M7.4 earthquake, Seismic intensity, Earthquake damage characteristics

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