UW RAPID UAV Imaging

The Ridgecrest Earthquake sequence included a M6.4 event on July 4 2019 followed by a M7.1 July 5 2019. These events occurred in the Eastern California Shear Zone, near Indian Wells Valley, south of China Lake and west of Searles Valley. The Geotechnical Extreme Events Reconnaissance (GEER) Association has partnered with several organizations to collect perishable data and document the important impacts of these events, including the United States Geological Survey, the California Geological Survey, the US Navy, the Southern California Earthquake Center, the National Aeronautics and Space Agency (NASA) Jet Propulsion Laboratory (JPL), and local utilities. Critical geotechnical features of this event are extensive surface ruptures, roads, water pipes, and gas pipes crossing the faults, liquefaction and lateral spreading, and liquefaction effects on structures. These effects are documented using field (ground) mapping, and Structure from Motion (SfM) using images collected by UAV's to develop high-resolution digital elevation models.

里奇克莱斯特地震序列包含2019年7月4日发生的矩震级6.4级事件，以及紧随其后的2019年7月5日矩震级7.1级事件。此次地震序列发生于加利福尼亚东部剪切带，毗邻印第安韦尔斯谷，地处中国湖以南、瑟尔斯谷以西区域。岩土工程极端事件勘察（Geotechnical Extreme Events Reconnaissance, GEER）协会联合多家机构开展协同工作，包括美国地质调查局、加利福尼亚地质调查局、美国海军、南加州地震中心、美国国家航空航天局（NASA）喷气推进实验室（JPL）以及当地公用事业公司，以采集易逝性现场数据并记录此次地震事件的各类重要影响。此次地震的关键岩土工程特征包括：大范围地表破裂、横穿断层的道路、给排水管道与天然气管道，液化与侧向扩移现象，以及液化效应对建（构）筑物的影响。上述各类现象均通过野外（地面）测绘，以及采用无人机采集影像、依托运动恢复结构（Structure from Motion, SfM）技术生成高分辨率数字高程模型的方式进行记录存档。