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GEOREF RECORD

Identifying a large landslide with small displacements in a zone of coseismic tectonic deformation; the Villa Del Monte landslide triggered by the 1989 Loma Prieta, California, earthquake

David K. Keefer, Edwin L. Harp and Gary B. Griggs
Identifying a large landslide with small displacements in a zone of coseismic tectonic deformation; the Villa Del Monte landslide triggered by the 1989 Loma Prieta, California, earthquake (in Catastrophic landslides; effects, occurrence, and mechanisms, Stephen G. Evans (editor) and Jerome V. DeGraff (editor))
Reviews in Engineering Geology (2002) 15: 117-134

Abstract

The Villa Del Monte landslide was one of 20 large and complex landslides triggered by the 1989 Loma Prieta, California, earthquake in a zone of pervasive coseismic ground cracking near the fault rupture. The landslide was approximately 980 m long, 870 m wide, and encompassed an area of approximately 68 ha. Drilling data suggested that movement may have extended to depths as great as 85 m below the ground surface. Even though the landslide moved <1 m, it caused substantial damage to numerous dwellings and other structures, primarily as a result of differential displacements and internal Assuring. Surface cracks, scarps, and compression features delineating the Villa Del Monte landslide were discontinuous, probably because coseismic displacements were small; such discontinuous features were also characteristic of the other large, coseismic landslides in the area, which also moved only short distances during the earthquake. Because features marking landslide boundaries were discontinuous and because other types of coseismic ground cracks were widespread in the area, identification of the landslides required detailed mapping and analysis. Recognition that landslides such as that at Villa Del Monte may occur near earthquake-generating fault ruptures should aid in future hazard evaluations of areas along active faults.


ISSN: 0080-2018
EISSN: 2169-799X
Coden: GAEGA4
Serial Title: Reviews in Engineering Geology
Serial Volume: 15
Title: Identifying a large landslide with small displacements in a zone of coseismic tectonic deformation; the Villa Del Monte landslide triggered by the 1989 Loma Prieta, California, earthquake
Title: Catastrophic landslides; effects, occurrence, and mechanisms
Author(s): Keefer, David K.Harp, Edwin L.Griggs, Gary B.
Author(s): Evans, Stephen G.editor
Author(s): DeGraff, Jerome V.editor
Affiliation: U. S. Geological Survey, Menlo Park, CA, United States
Affiliation: Geological Survey of Canada, Natural Resources Canada, Ottawa, ON, Canada
Pages: 117-134
Published: 2002
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 0-8137-4115-7
References: 38
Accession Number: 2003-036888
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 1 table, geol. sketch maps
N36°51'00" - N37°16'00", W122°17'60" - W121°35'60"
Secondary Affiliation: Sierra National Forest, USA, United StatesUniversity of California at Santa Cruz, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200312
Program Name: USGSOPNon-USGS publications with USGS authors
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