https://scholars.lib.ntu.edu.tw/handle/123456789/542608
標題: | Mapping surface breakages of the 2018 Hualien earthquake by using UAS photogrammetry | 作者: | Lin, Y.-S. Chuang, R.Y. Yen, J.-Y. Chen, Y.-C. Kuo, Y.-T. Wu, B.-L. Huang, S.-Y. RAY Y. CHUANG CI-JIAN YANG |
公開日期: | 2019 | 卷: | 30 | 期: | 3 | 起(迄)頁: | 351-366 | 來源出版物: | Terrestrial, Atmospheric and Oceanic Sciences | 摘要: | The distributions and characteristics of coseismic surface ruptures are the key to understand fault behaviors. However, traditional field investigations could be time consuming while toppled buildings and damaged infrastructure may be subject to repairs due to rescue missions and transportation recovery within a few days after the earthquake, leading to urgent needs for rapid, extensive surveys before surface breakages are modified. Therefore, we take advantage of UAS photogrammetry to collect aerial images and to map surface fractures for the Mw 6.4 Hualien, eastern Taiwan, earthquake on 6 February 2018. The earthquake struck Hualien City and generated dense surface breakages over a distance of ~8 km. Together with control surveys for ground control points by using RTK-GPS, UAS photogrammetry uses the methods of the Structure from Motion and Multi-View Stereo to produce high-resolution orthoimages and digital surface models. Our mapping results show that surface ruptures follow the trace of the Milun fault and northern Linding fault. Mapped surface ruptures are usually in en échelon arrays or distributed fractures rather than a through-going fault. Estimated sinistral offset based on orthoimages is more than 60 cm in Chihsingtan and decreases toward south. The fault behavior of the 2018 Hualien earthquake shows along-strike variations and is somewhat different from the October 1951 earthquake. © 2019 Chinese Geoscience Union. All rights reserved. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85079589919&partnerID=40&md5=b7a930ed43231632066d49d29d243587 https://scholars.lib.ntu.edu.tw/handle/123456789/542608 |
DOI: | 10.3319/TAO.2018.12.09.02 |
顯示於: | 地理環境資源學系 |
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