强震地表破裂调查与灾情评估是地震应急响应的重要工作内容，快速获取震后高分辨率卫星数据并开展应急信息提取分析，是提升应急时效性的重要支撑手段。2022年1月8日青海门源Ms6.9级地震发生的当天快速获取了国产高分七号卫星等数据，基于分辨率0.65 m的全色及2.6 m的多光谱图像快速解译分析地震地表破裂带分形成布特征、构造样式与位错强度等，为地震应急响应与现场调查提供了重要信息。深入分析表明，门源Ms6.9级地震发生了南、北两条同震地表破裂带，其中北支沿冷龙岭断裂带主断层的西段发育，长度约19 km；南支沿托莱山断裂东段分布，长度约2.3 km。同震地表破裂带左旋断错了一系列冲沟、洪积物、道路、冰层等地貌特征，最大左旋位移约2.2 m，沿地表破裂带形成鼓包、拉张凹陷、斜列式张裂隙等变形构造。最新同震破裂与历史破裂分布吻合，反映了强震活动的原地破裂特征，其地震危险性需要引起高度关注，值得深入研究。GF-7卫星首次在地震灾害发生当日就发挥较大优势，表明高分系列卫星在地震应急调查方面具有良好应用潜力。

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.