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Landslides

Towhata, Ikuo

Abstract Earthquake is one of the major causes of landslides. Keefer (1984) summarized past records to classify them and also to show the maximum distance to landslides for varying seismic magnitudes. He also showed that the minimum earthquake magnitude to cause landslides is M L = 4.0 according to US records. It seems, however, that this number depends on local geology as well as the annual rainfall. Figure 15.1 shows an overall view of a large landslide which occurred near Galdian village during the 1990 Manjil earthquake (M = 7.3) in Iran (Ishihara et al. 1992). The soil type in the slip plane was clayey as indicated by the exposed slip plane (Fig. 15.2). Some part of the sliding soil was mixed with water and formed a mud flow (Fig. 15.3). It is not uncommon that sliding mass is significantly fluidized and reaches an unexpectedly long distance.

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Landslides

Towhata, Ikuo

Abstract Earthquake is one of the major causes of landslides. Keefer (1984) summarized past records to classify them and also to show the maximum distance to landslides for varying seismic magnitudes. He also showed that the minimum earthquake magnitude to cause landslides is M L = 4.0 according to US records. It seems, however, that this number depends on local geology as well as the annual rainfall. Figure 15.1 shows an overall view of a large landslide which occurred near Galdian village during the 1990 Manjil earthquake (M = 7.3) in Iran (Ishihara et al. 1992). The soil type in the slip plane was clayey as indicated by the exposed slip plane (Fig. 15.2). Some part of the sliding soil was mixed with water and formed a mud flow (Fig. 15.3). It is not uncommon that sliding mass is significantly fluidized and reaches an unexpectedly long distance.

Landslides

Towhata, Ikuo

Abstract Earthquake is one of the major causes of landslides. Keefer (1984) summarized past records to classify them and also to show the maximum distance to landslides for varying seismic magnitudes. He also showed that the minimum earthquake magnitude to cause landslides is M L = 4.0 according to US records. It seems, however, that this number depends on local geology as well as the annual rainfall. Figure 15.1 shows an overall view of a large landslide which occurred near Galdian village during the 1990 Manjil earthquake (M = 7.3) in Iran (Ishihara et al. 1992). The soil type in the slip plane was clayey as indicated by the exposed slip plane (Fig. 15.2). Some part of the sliding soil was mixed with water and formed a mud flow (Fig. 15.3). It is not uncommon that sliding mass is significantly fluidized and reaches an unexpectedly long distance.

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Title:

Landslides

Contributors:

Towhata, Ikuo (author)

Published in:

Geotechnical Earthquake Engineering ; 290-313

Springer Series in Geomechanics and Geoengineering

Publication date:

2008-01-01

Size:

24 pages

ISBN:

978-3-540-35782-7 , 978-3-540-35783-4

ISSN:

1866-8755 , 1866-8763

DOI:

https://doi.org/10.1007/978-3-540-35783-4_15

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Debris Flow , Slope Failure , Excess Pore Water Pressure , Turbidity Current , Landslide Mass Engineering , Geoengineering, Foundations, Hydraulics , Geology , Geotechnical Engineering & Applied Earth Sciences , Solid Mechanics , Civil Engineering

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