Lost River Fault Zone Near Borah Peak, Idaho

<p>The contribution comprises high-resolution topography and orthomosaics of part of the Lost River fault zone (LFRZ), Idaho, USA. The data set covers the northern ~16 km of the surface-rupture that occurred on the LRFZ in the Mw 6.9 1983 Borah Peak Earthquake. Point clouds and digital surface models (DSMs), were generated from low-altitude aerial photographs using Structure-from-Motion and multi-view stereo processing (SfM). The LRFZ is a major, range-bounding, west-dipping normal fault in the northern Basin and Range province. The Mw 6.9 1983 Borah Peak earthquake occurred on it and created surface rupture along the southern portion of the Warm Spring section and the entire Thousand Springs section of the fault (Crone et al., 1987; DuRoss et al., 2019).</p> <p>The Warm Spring and Thousand Springs sections are separated by the Willow Creek Hills, which form a structural boundary. We used unoccupied aerial systems (UAS) and a tethered "helikite" balloon to acquire aerial photographs, which were combined with ground control georeferencing to create two point clouds that model the topography at high resolution (< 10 cm) along the northern ~16 km of surface rupture. One point cloud covers the southern ~9 km of the Warm Spring Section and a second point cloud covers the northern ~7 km of the Thousand Springs Section.</p><p> DSMs were generated from the point clouds, and orthomosaics of each area were made from the aerial photographs. The primary motivation for acquisition of the data set was study of the surface offset across the Willow Creek Hills structural boundary from the 1983 earthquake and prehistoric surface-rupturing events (DuRoss et al., 2019). <br /><br /> <u>For more information, see the publication:</u><br /> DuRoss, C.B., Bunds, M.P., Gold, R.D., Briggs, R.W., Reitman, N.G., Personius, S.F., Toke, N.A., 2019, Variable normal-fault rupture behavior, northern Lost River fault zone, Idaho, USA, Geosphere, v 15,https://doi.org/10.1130/GES02096.1 </p>

<p>本贡献包括美国爱达荷州Lost River断层带（LRFZ）部分的高分辨率地形和正射影像。该数据集涵盖了1983年Mw 6.9级的Borah Peak地震中LRFZ发生的表面破裂的北部约16公里区域。通过结构光运动（SfM）和多视角立体处理技术，从低空航拍照片中生成了点云和数字表面模型（DSM）。LRFZ是北盆地和山脉省的一个主要、范围限定、西倾的正常断层。1983年Mw 6.9级的Borah Peak地震即发生于此，并在Warm Spring部分南部和断层Thousand Springs部分全线上造成了地表破裂（Crone等，1987；DuRoss等，2019）。</p><p>Warm Spring部分和Thousand Springs部分之间由Willow Creek Hills山丘分隔，形成了一个结构边界。我们利用无人机（UAS）和系留的“直升机风筝”气球获取了航拍照片，并结合地面控制地理配准技术，创建了两个点云，以高分辨率（<10厘米）模拟了北部约16公里地表破裂的地形。一个点云覆盖了Warm Spring部分南部约9公里区域，另一个点云覆盖了Thousand Springs部分北部约7公里区域。</p><p>从点云生成了DSM，并从航拍照片中制作了各个区域的正射影像。收集该数据集的主要动机是研究1983年地震和史前地表破裂事件在Willow Creek Hills结构边界处的地表位移（DuRoss等，2019）。</p><p><u>欲了解更多信息，请参阅以下出版物：</u><br />DuRoss, C.B., Bunds, M.P., Gold, R.D., Briggs, R.W., Reitman, N.G., Personius, S.F., Toke, N.A., 2019, Variable normal-fault rupture behavior, northern Lost River fault zone, Idaho, USA, Geosphere, v 15, https://doi.org/10.1130/GES02096.1</p>