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Rapid emergency analysis of the surface rupture related to the Qinghai Menyuan Ms6.9 earthquake on January 8， 2022， using GF-7 satellite images

  • role： First author第一作者
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

    Key Laboratory of Emergency Satellite Engineering and Application,Ministry of Emergency Management, Beijing 100124, China

  • Email：1985jqs@163.com
  • Introduction：焦其松， 研究方向为活动断层遥感探查及灾害遥感应急。E-mail： 1985jqs@163.com
JIAO Qisong12,  
  • role： Corresponding author通信作者
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

    Key Laboratory of Emergency Satellite Engineering and Application,Ministry of Emergency Management, Beijing 100124, China

    Institute of Disaster Prevention, Langfang 065201, China

  • Email：jiang_wenliang@163.com
  • Introduction：姜文亮，研究方向为灾害遥感理论与方法研究、地震地质灾害应急评估等。E-mail：jiang_wenliang@163.com
JIANG Wenliang123*,  
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

    Key Laboratory of Emergency Satellite Engineering and Application,Ministry of Emergency Management, Beijing 100124, China

LI Qiang12,  
  • Affiliation：

    Earth Observation System and Data Center, China National Space Administration, Beijing 100048, China

LAI Jibao4,  
  • Affiliation：

    Earth Observation System and Data Center, China National Space Administration, Beijing 100048, China

ZHENG Yi4,  
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

HE Zhongtai1,  
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

SHEN Wenhao1,  
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

    Key Laboratory of Emergency Satellite Engineering and Application,Ministry of Emergency Management, Beijing 100124, China

LI Yongsheng12,  
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

    Key Laboratory of Emergency Satellite Engineering and Application,Ministry of Emergency Management, Beijing 100124, China

LUO Yi12,  
  • Affiliation：

    National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China

    Key Laboratory of Emergency Satellite Engineering and Application,Ministry of Emergency Management, Beijing 100124, China

ZHANG Jingfa12

реферат

The surface rupture investigation and disaster assessment of large earthquakes are important in earthquake emergency response. The rapid data acquisition and analysis of satellite images after earthquakes are of great importance for improving the timeliness of emergency response. After the Menyuan Ms6.9 earthquake, we quickly acquired GF-7 satellite images on January 8, 2022, and identified the overall distribution characteristics, structural style, and dislocation scale of the surface rupture, which provided an important reference for earthquake emergency response and field investigation. According to the deep analysis of high-resolution satellite images, the Menyuan Ms6.9 earthquake generated two co-seismic surface rupture zones, of which the north branch mainly developed along the western part of the Lenglongling fault, and the recognizable surface rupture zone is approximately 19 km-long. The south branch with a length of 2.3 km was distributed along the eastern part of the Tuolaishan fault. The co-seismic surface rupture produced a series of sinistral faulted geomorphic features such as gullies, diluvium, roads, ice layers, etc., and the maximum sinistral displacement was about 2.2 m. Deformation structures such as bulges, tension depressions and oblique tension fissures were formed along the surface fracture zone. The distribution of the latest co-seismic rupture coincided with the historical rupture, which reflected the in-situ rupture characteristics of strong earthquakes along the Lenglongling fault zone. Its seismic risk needed to be highly concerned and deserved in-depth study. This application work shows that the great potential and advantages of the China High-Resolution Satellites in major earthquake emergency.

ключеви́че слова́

Menyuan earthquake;Emergency response;GF-7;Earthquake surface rupture;Structure analysis

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