Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL093318 |
LiDAR and paleoseismology solve earthquake mystery in the Pacific Northwest, USA | |
Brian L. Sherrod; Richard J. Blakely; Craig S. Weaver | |
2021-08-06 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | One of the largest historical earthquakes in the U.S. Pacific Northwest occurred on 15 December 1872 near the south end of Lake Chelan. Lack of recognized surface deformation suggested that the earthquake occurred on a blind, perhaps deep, fault. New LiDAR data revealed a NW-side-up scarp along the north side of Spencer Canyon near Entiat, Washington. Landslides triggered during the earthquake impounded small ponds in Spencer Canyon; the larger of the two landslides obliterated a portion of the scarp. Tree-ring counts show that the oldest trees on each landslide are 130 and 128 years old, and lend credence to the idea that the earthquake triggered the landslides. Trenches across the scarp exposed a NW-dipping thrust fault offsetting young soils and Mesozoic bedrock. Radiocarbon and tree ring data shows that the last fault movement was between 1856 CE and 1873 CE, and was most likely during the 1872 CE earthquake. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335466 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Brian L. Sherrod,Richard J. Blakely,Craig S. Weaver. LiDAR and paleoseismology solve earthquake mystery in the Pacific Northwest, USA[J]. Geophysical Research Letters,2021. |
APA | Brian L. Sherrod,Richard J. Blakely,&Craig S. Weaver.(2021).LiDAR and paleoseismology solve earthquake mystery in the Pacific Northwest, USA.Geophysical Research Letters. |
MLA | Brian L. Sherrod,et al."LiDAR and paleoseismology solve earthquake mystery in the Pacific Northwest, USA".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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