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Increasing Postearthquake Field Mapping Efficiency with Optical Image Correlation
Bulletin of the Seismological Society of America ( IF 3 ) Pub Date : 2020-08-01 , DOI: 10.1785/0120200034
Alexander E. Morelan 1 , Janis L. Hernandez 2
Affiliation  

Mapping fault surface rupture in the aftermath of earthquakes quickly and efficiently is critical to both emergency responders and scientific investigations. We applied an optical imagery correlation technique to map, in detail, the location (not magnitude of displacement) of the surface‐rupture trace of the 2019 Ridgecrest earthquake sequence to help provide field responders with information to guide response. Emergency managers need to know the location and amount of deformation that has occurred to effectively allocate resources for critical infrastructure repair as soon as possible after earthquakes. Scientific responders need to know the spatial pattern of deformation to determine where to send field teams to conduct scientific reconnaissance and to found later in‐depth scientific research. Rapid scientific response is important because earthquake surface ruptures are often fragile features that do not persist in the landscape for more than a few weeks or months at locations with high anthropogenic or climatic modification. Remote sensing techniques have proven effective at aiding event response efforts by guiding field teams to locations with deformation and damage. We focus here on the utility and advantages of detailed remote sensing interpretations of the surface‐rupture trace made using an optical image correlation map of relative surface displacement in the weeks after the 2019 Ridgecrest earthquake sequence.

中文翻译:

利用光学图像相关性提高震后野外制图效率

快速有效地绘制地震后的断层表面破裂图对于应急人员和科学研究都是至关重要的。我们应用了光学图像相关技术来详细绘制2019年Ridgecrest地震序列地表破裂迹线的位置(而不是位移的大小),以帮助为现场响应者提供指导响应的信息。紧急管理人员需要知道发生的变形的位置和数量,以便在地震后尽快有效地分配资源用于关键基础设施的维修。科学响应者需要了解变形的空间模式,以确定派遣野外工作队进行科学勘察的位置,并建立以后的深入科学研究。快速的科学响应非常重要,因为地震地表破裂通常是易碎的特征,在人为或气候变化较大的地区,这种破裂不会持续数周或数月。事实证明,遥感技术可以有效地指导现场团队前往发生变形和损坏的地点,从而有助于事件响应工作。在此,我们将重点关注在2019年Ridgecrest地震序列发生后的几周内使用相对表面位移的光学图像相关图对表面破裂痕迹进行详细遥感解释的实用性和优势。事实证明,遥感技术可以有效地指导现场团队前往发生变形和损坏的地点,从而有助于事件响应工作。在此,我们将重点关注在2019年Ridgecrest地震序列发生后的几周内使用相对表面位移的光学图像相关图对表面破裂轨迹进行详细遥感解释的实用性和优势。事实证明,遥感技术可以有效地指导现场团队前往发生变形和损坏的地点,从而有助于事件响应工作。在此,我们将重点关注在2019年Ridgecrest地震序列发生后的几周内使用相对表面位移的光学图像相关图对表面破裂轨迹进行详细遥感解释的实用性和优势。
更新日期:2020-08-20
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