Earthquake-triggered landslides in southwest China

Other literature type, Article English OPEN
X. L. Chen ; Q. Zhou ; H. Ran ; R. Dong (2012)
  • Publisher: Copernicus Publications
  • Journal: Natural Hazards and Earth System Sciences (issn: 1561-8633, eissn: 1684-9981)
  • Related identifiers: doi: 10.5194/nhess-12-351-2012
  • Subject: G | GE1-350 | Geography. Anthropology. Recreation | QE1-996.5 | Environmental technology. Sanitary engineering | Environmental sciences | Geology | TD1-1066

Southwest China is located in the southeastern margin of the Tibetan Plateau and it is a region of high seismic activity. Historically, strong earthquakes that occurred here usually generated lots of landslides and brought destructive damages. This paper introduces several earthquake-triggered landslide events in this region and describes their characteristics. Also, the historical data of earthquakes with a magnitude of 7.0 or greater, having occurred in this region, is collected and the relationship between the affected area of landslides and earthquake magnitude is analysed. Based on the study, it can be concluded that strong earthquakes, steep topography as well as fragile geological environment, are the main reasons responsible for serious landslides in southwest China. At the same time, it is found that the relationship between the area affected by landslides and the earthquake magnitude in this region are consistent with what has been obtained worldwide. Moreover, in this paper, it is seen that the size of the areas affected by landslides change enormously even under the same earthquake magnitude in the study region. While at the same tectonic place or fault belt, areas affected by landslides presented similar outline and size. This means that local geological conditions and historical earthquake background have an important influence on landslides distribution, and they should be considered when assessing earthquake-triggered landslide hazards at Grade 1 according to ISSMGE.
  • References (48)
    48 references, page 1 of 5

    Australian geomechanics society landslide zoning working group: Guideline for landslide susceptibility, hazard and risk zoning for land use planning, Australian Geomechanics, 42, March, 2007.

    Bommer, J. J., Carlos, E., and Rodr┬┤─▒guez, C. R.: Earthquakeinduced landslides in Central America, Eng. Geol., 63, 189-220, 2002.

    Cornell, C. A.: Engineering Seismic Risk Analysis, Bull. Seism. Soc. Am., 58, 1583-1606, 1968.

    Chen, X. L., Nobuaki, K., Ryosuke, T., and Kato, N.: Prediction of slope failure due to earthquake, Chinese Science Bulletin, 54, 2888-2894, 2009.

    Chen, X. L., Zhou, B. G., Ran, H. L., Yamamoto, Y., and Hyodo, M.: Geohazards induced by the Wenchuan Earthquake, Geologically Active, Taylor & Francis Group, London, ISBN 978-0-415- 60034-7, 2010.

    Chengdu earthquake investigation team of State seismological Bureau: Reports on investigation of Luhuo earthquake occurred on Feb. 6, 1973 (in Chinese).

    Chinese seismic ground motion zoning working group: Seismic zonig map in China, Beijing, Standards Press of China, 2001 (in Chinese).

    Earthquake Administration of Sichuan Province: 1976 Songpan earthquake (in Chinese), Beijing, Seismological Press, 1979 (in Chinese).

    Earthquake Administration of Sichuan Province: 1981 Daofu earthquake (in Chinese), Beijing, Seismological Press, 1986 (in Chinese).

    Earthquake disaster prevention department of State seismological Bureau: Catalogue of historical strong earthquakes in China (23rd century B. C. to 1911), Beijing, Seismological Press, 1995 (in Chinese).

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