期刊
LANDSLIDES
卷 15, 期 2, 页码 327-332出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10346-017-0926-4
关键词
Rock avalanche; Tsunamigenic landslide; 3D observation
资金
- National Science Foundation through the NSF RAPID award [CMMI-1748631]
- Polar Geospatial Center under NSF OPP awards [1043681, 1559691, 1542736]
On 17 June 2017, a landslide-generated tsunami reached the village of Nuugaatsiaq, Greenland, leaving four persons missing and presumed dead. Here, we present a preliminary high-resolution analysis of the tsunamigenic landslide scar based on three-dimensional (3D) reconstructions of oblique aerial photographs taken during a post-failure reconnaissance helicopter overflight. Through a 3D quantitative comparison with pre-failure topography, we estimate that approximately 58 million m(3) of rock and colluvium (talus) was mobilized during the landslide, 45 million m(3) of which reached the fjord, resulting in a destructive tsunami. We classify this event as a tsunamigenic extremely rapid rock avalanche, which likely released along a pre-existing metamorphic fabric, bounded laterally by slope-scale faults. Further analysis is required to properly characterize this landslide and adjacent unstable slopes, and to better understand the tsunami generation.
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