High-resolution structure-from-motion models covering 160 km-long surface ruptures of the 2021 M_(W)7.4 Madoi earthquake in northern Qinghai-Tibetan Plateau  

作　　者：Jing Liu-Zeng Wenqian Yao Xiaoli Liu Yanxiu Shao Wenxin Wang Longfei Han Yan Wang Xianyang Zeng Jinyang Li Zijun Wang Zhijun Liu Hongwei Tu 

机构地区：[1]Institute of Surface-Earth System Science,School of Earth System Science,Tianjin University,Tianjin,300072,China [2]State Key Laboratory of Earthquake Dynamics,Institute of Geology,China Earthquake Administration,Beijing,100029,China [3]Key Laboratory of Earthquake Geodesy,Institute of Seismology,China Earthquake Administration,Wuhan,430071,China [4]Earthquake Agency of Qinghai Province,Xining,810001,China

出　　处：《Earthquake Research Advances》2022年第2期38-48,共11页地震研究进展（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(U1839203,42011540385);the National Key Laboratory of Earthquake Dynamics(LED2020B03,IGCEA1812);the Science and Technology Projects of Qinghai Province(2020-ZJ-752).

摘　　要：The May 222021 M_(W)7.4 Madoi,Qinghai,China earthquake presented a rare opportunity to apply the modern unmanned aerial vehicle(UAV)photography method in extreme altitude and weather conditions to image surface ruptures and near-field effects of earthquake-related surface deformations in the remote Tibet.High-resolution aerial photographs were acquired in the days immediately following the mainshock.The complex surface rupture patterns associated with this event were covered comprehensively at 3-6 cm resolution.This effort represents the first time that an earthquake rupture in the interior of the Qinghai-Tibetan Plateau has been fully and systematically captured by such high-resolution imagery,with an unprecedented level of detail,over its entire length.The dataset has proven valuable in documenting subtle and transient rupture features,such as the significant mole-tracks and opening fissures,which were ubiquitous coseismically but degraded during the subsequent summer storm season.Such high-quality imagery also helps to document with high fidelity the fractures of the surface rupture zone(supplements of this paper),the pattern related to how the faults ruptured to the ground surface,and the distribution of off-fault damage.In combination with other ground-based mapping efforts,the data will be analyzed in the following months to better understand the mechanics of earthquake rupture related to the fault zone rheology,rupture dynamics,and frictional properties along with the fault interface.

关 键 词：UAV photography Earthquake surface rupture STRUCTURE-FROM-MOTION 2021 M_(W)7.4 Madoi earthquake 

分 类 号：P315[天文地球—地震学]