Landslides triggered by the Ms 6.9 Nyingchi earthquake, China (18 November 2017): analysis of the spatial distribution and occurrence factors

On 18 November 2017, a magnitude Ms. 6.9 (Mw 6.4) earthquake struck Nyingchi, Tibet Autonomous Region, China, which is located in the famous Grand Canyon region of the Yarlung Zangbo River in the eastern Himalayas, Tibet. The Nyingchi event was a thrusting event, with a focal depth of 12 km at 29.87...

Full description

Saved in:
Bibliographic Details
Published in:Landslides 2019-04, Vol.16 (4), p.765-776
Main Authors: Zhao, Bo, Li, Weile, Wang, Yunsheng, Lu, Jiayan, Li, Xiang
Format: Article
Language:English
Subjects:
Agriculture
Avalanches
Canyons
Civil Engineering
Disaster relief
Distribution
Earth and Environmental Science
Earth Sciences
Earthquakes
Elevation
Geographical distribution
Geography
Geology
Hanging walls
Lakes
Landslides
Landslides & mudslides
Lithology
Natural Hazards
Recent Landslides
Remote sensing
Rivers
Rock falls
Rocks
Seismic activity
Slopes
Spatial analysis
Spatial distribution
Statistical analysis
Tectonics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:On 18 November 2017, a magnitude Ms. 6.9 (Mw 6.4) earthquake struck Nyingchi, Tibet Autonomous Region, China, which is located in the famous Grand Canyon region of the Yarlung Zangbo River in the eastern Himalayas, Tibet. The Nyingchi event was a thrusting event, with a focal depth of 12 km at 29.87° N and 95.02° E. According to emergency investigations and remote sensing, the Nyingchi event triggered at least 1820 co-seismic landslides. The landslides mainly occurred in the Grand Canyon region within an area of 527 km 2 (the inner area of Namcha Barwa tectonic node). The landslide distribution characterises an obvious hanging wall effect and is classified as “small concentration region and large landslide distribution area”. The failure patterns mainly consist of rock falls, rock avalanches, and deposit failures. One co-seismic landslide partially blocked the Yarlung Zangbo River, and the barrier lake remained. Different influencing factors, such as the seismic fault, river, slope aspect, slope angle, rocks, and elevation, have different influences on landslide occurrences, and the co-seismic landslides in the hanging wall area and footwall area present obviously different characteristics. Additionally, the post-earthquake effect impacted the recent Sedongpu landslide.
ISSN:1612-510X
1612-5118
DOI:10.1007/s10346-019-01146-2