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GEOREF RECORD

Dynamic analysis of a slope failure from the 6 August 1979 Coyote Lake, California, earthquake

Raymond C. Wilson and David K. Keefer
Dynamic analysis of a slope failure from the 6 August 1979 Coyote Lake, California, earthquake
Bulletin of the Seismological Society of America (June 1983) 73 (3): 863-877

Abstract

The earthquake displaced a slump and formed a fissure 20 m long; with vertical offsets of 9 mm and horizontal offsets of 18 mm. The slump is within 100 m of the Calaveras fault trace. Two strong-motion records were written in the vicinity. These records combined with measurements of the slope, estimates of the material properties, and a dynamic numerical model based on the Newmark analysis of seismic slope stability to calculate a predicted displacement for the landslide. A displacement of 27 mm, calculated using the N50 degrees E component of the Gilroy #6 record, is in excellent agreement with the displacement measured in the field (21 mm). However, displacements of only 0.12 mm, calculated using the 250 degrees component of the Coyote Creek strong-motion record, reflect significant local variations in seismic shaking intensity. Because strong-motion records and slope failures rarely coincide, this landslide is an important test case for studying the dynamics of seismically induced landslides, as well as a warning that local seismologic variations need to be considered in any design applications.--Modified journal abstract.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 73
Serial Issue: 3
Title: Dynamic analysis of a slope failure from the 6 August 1979 Coyote Lake, California, earthquake
Affiliation: U. S. Geol. Surv., Menlo Park, CA, United States
Pages: 863-877
Published: 198306
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 14
Accession Number: 1983-051894
Categories: Engineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
N37°00'00" - N37°04'60", W121°34'60" - W121°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1983
Program Name: USGSOPNon-USGS publications with USGS authors
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