TY - JOUR
T1 - Characteristics of landslides triggered by the 2013 M L6.5 Nantou, Taiwan, earthquake
AU - Wu, Bing Sheng
AU - Chuang, Ray Y.
AU - Chen, Yi Chin
AU - Lin, Ya Shien
N1 - Funding Information:
This research is supported by the Ministry of Science and Technology with project number of 107-2119-M-003-003-MY2 and 109-2116-M-002-011.
Funding Information:
We thank Dr. Nai-Chi Hsiao for providing technical supports. We thank the Central Weather Bureau for providing data. We thank US Geological Survey for providing Landsat imagery. We thank the Ministry of Interior for providing digital topographic data. The figures were generated using the Generic Mapping Tools (GMT) and ESRI ArcGIS.
Publisher Copyright:
© 2021, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Earthquake-triggered landslides are common disasters of active mountain belts. Due to the lack of earthquake-triggered landslide inventory in Taiwan, it is not intuitive to observe spatial relationships and discover unique patterns between landslides and essential triggers. We examined strong earthquake events in Taiwan after the 1999 Mw7.6 Chi-Chi earthquake and targeted the 2013 ML6.5 Nantou earthquake to create the landslide inventory. We adopted two Landsat-8 satellite images before and after the event to detect landslides, and incorporated a 20-m DEM and rock type data of Taiwan to represent key factors triggering earthquake-induced landslides such as peak ground acceleration (PGA), lithology, slope roughness, slope, and aspect. Based on the analysis of the density of landslides, there are strong correlations between the landslide occurrence and seismic and geomorphic factors. Furthermore, we noticed that the landslide aspects have a systematic tendency towards the northeast, which is not correlated with the dip directions and wave propagation directions. Instead, we found that the northeastward landslide aspect is more associated with the westward–southwestward surface movement at the landslides. We found that the included angles between the landslide aspects and the displacement directions for all the landslides are ~ 100°–180°. The relationship indicated that the coseismic deformation of the Nantou earthquake may play a role in the landslide distribution. Graphical Abstract: [Figure not available: see fulltext.]
AB - Earthquake-triggered landslides are common disasters of active mountain belts. Due to the lack of earthquake-triggered landslide inventory in Taiwan, it is not intuitive to observe spatial relationships and discover unique patterns between landslides and essential triggers. We examined strong earthquake events in Taiwan after the 1999 Mw7.6 Chi-Chi earthquake and targeted the 2013 ML6.5 Nantou earthquake to create the landslide inventory. We adopted two Landsat-8 satellite images before and after the event to detect landslides, and incorporated a 20-m DEM and rock type data of Taiwan to represent key factors triggering earthquake-induced landslides such as peak ground acceleration (PGA), lithology, slope roughness, slope, and aspect. Based on the analysis of the density of landslides, there are strong correlations between the landslide occurrence and seismic and geomorphic factors. Furthermore, we noticed that the landslide aspects have a systematic tendency towards the northeast, which is not correlated with the dip directions and wave propagation directions. Instead, we found that the northeastward landslide aspect is more associated with the westward–southwestward surface movement at the landslides. We found that the included angles between the landslide aspects and the displacement directions for all the landslides are ~ 100°–180°. The relationship indicated that the coseismic deformation of the Nantou earthquake may play a role in the landslide distribution. Graphical Abstract: [Figure not available: see fulltext.]
KW - Coseismic deformation
KW - Earthquake-induced landslides
KW - Landslide aspect
KW - Mass movement
UR - http://www.scopus.com/inward/record.url?scp=85122188432&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122188432&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/52366222-cafd-3d16-afc9-5f016d02e475/
U2 - 10.1186/s40623-021-01560-8
DO - 10.1186/s40623-021-01560-8
M3 - Article
AN - SCOPUS:85122188432
VL - 74
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1880-5981
IS - 1
M1 - 7
ER -