中国地震局公布，科研团队于10月26日利用应急无人机首次获取了西藏那曲市巴青县10月22日夜间发生的7.0级地震同震地表破裂高清影像 1。此次调查由青海省地震局联合中国地震灾害防御中心、西藏自治区地震局共同开展 1。
通过实地调查与数据分析，专家确认该次地震的发震构造为北北向的玛如乡断裂带 1。在距离巴青县玛如乡20公里、震中以东15公里的日阿曲河道附近发现了第一个破裂点 1。数据显示，该破裂带以正断层为主并兼有左旋走滑分量，同震垂直位错量约为3.5米，局部可见左旋位错约0.9米，破裂带宽度介于8米至30米之间 1。这一发现为后续的灾损评估、重建选址及活动断裂避让提供了关键科学依据 1。
Researchers have identified the causative fault of the magnitude 7.0 earthquake in Baqing County, Nagqu City, Tibet, after obtaining high-definition imagery of co-seismic surface ruptures via emergency drones for the first time 1. The Qinghai Earthquake Bureau, in collaboration with the China Earthquake Disaster Prevention Center and the Tibet Autonomous Region Earthquake Bureau, captured these images on October 26, documenting ground deformation caused by the seismic event that struck overnight on October 22 1.
The investigation concluded that the rupture occurred along the north-northwest-trending Maruxiang Fault Zone 1. Field surveys and data analysis revealed that the faulting was primarily normal (extensional) with left-lateral strike-slip components 1. Specific measurements indicate a vertical displacement of approximately 3.5 meters, with localized horizontal offsets of about 0.9 meters observed in certain sections 1. The width of the rupture zone varies between 8 and 30 meters 1.
The initial point of surface rupture was discovered near the Ri'aqu riverbed, located 20 kilometers from Maruxiang Township and 15 kilometers east of the epicenter 1. These findings provide key scientific evidence for subsequent disaster loss assessments, reconstruction site selection, and strategies to avoid active fault lines 1.
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