Near-Field High-Resolution Maps of the Ridgecrest Earthquakes from Aerial Imagery
Near-Field High-Resolution Maps of the Ridgecrest Earthquakes from Aerial Imagery
复制标题
航空图像显示的里奇克莱斯特地震近场高分辨率地图
DOI：
10.1785/0220210234
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发表时间：
2021
影响因子：
3.3
通讯作者：
Leslie Garcia
中科院分区：
文献类型：
--
作者：
Alba M. Rodriguez Padilla;Mercedes A. Quintana;Ruth M. Prado;Brian J. Aguilar;Thomas A. Shea;M. Oskin;Leslie Garcia
地表破裂地震的高分辨率地图是量化破裂危险、了解破裂传播机制以及解释过去地震证据的重要工具。我们展示了 2019 年里奇克莱斯特地震地表破裂五个部分的高度详细地图，这些地图源自每像素 5 厘米的航空图像和每像素 2-20 厘米的无人机图像。我们的高分辨率地图涵盖了复杂性和分布式变形的区域、应变非常局部的区域以及破裂突破沉积物和基岩的区域，确保对该地震序列的不同破裂类型进行采样。这些地图以高细节水平揭示了地表破裂的近场变形，解决了低于机载激光雷达数据、现场测绘和大地测量分辨率的二次破裂、横向扩散和液化特征的程度。这些数据可以用作机器学习训练数据集，并为详细的运动学分析和高分辨率概率位移危险分析提供机会。
High-resolution maps of surface rupturing earthquakes are essential tools for quantifying rupture hazard, understanding the mechanics of rupture propagation, and interpreting evidence of past earthquakes in the landscape. We present highly detailed maps of five portions of the surface rupture of the 2019 Ridgecrest earthquakes, derived from 5 cm per pixel aerial imagery and 2–20 cm per pixel unmanned aerial vehicle imagery. Our high-resolution maps cover areas of complexity and distributed deformation, sections in which strain is very localized, and areas where the rupture breaks through sediment and bedrock, ensuring sampling of the diverse rupture styles of this earthquake sequence. These maps reveal the near-field deformation of the surface rupture with a high level of detail, resolving the extent of secondary fracturing, lateral spreading, and liquefaction features that are below the resolution of airborne lidar data, field mapping, and geodesy. These data may serve as a machine learning training dataset, and offer opportunities for detailed kinematic analysis and high-resolution probabilistic displacement hazard analysis.