Statiscal analysis of an earthquake-induced landslide distribution - The 1989 Loma Prieta, California event
Engineering Geology
By: D. K. Keefer
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Abstract
The 1989 Loma Prieta, California earthquake (moment magnitude, M=6.9) generated landslides throughout an area of about 15,000 km2 in central California. Most of these landslides occurred in an area of about 2000 km2 in the mountainous terrain around the epicenter, where they were mapped during field investigations immediately following the earthquake. The distribution of these landslides is investigated statistically, using regression and one-way analysisof variance (ANOVA) techniques to determine how the occurrence of landslides correlates with distance from the earthquake source, slope steepness, and rock type. The landslide concentration (defined as the number of landslide sources per unit area) has a strong inverse correlation with distance from the earthquake source and a strong positive correlation with slope steepness. The landslide concentration differs substantially among the various geologic units in the area. The differences correlate to some degree with differences in lithology and degree of induration, but this correlation is less clear, suggesting a more complex relationship between landslide occurrence and rock properties. ?? 2000 Elsevier Science B.V. All rights reserved.
Suggested Citation
Keefer, D.K., 2000, Statiscal analysis of an earthquake-induced landslide distribution - The 1989 Loma Prieta, California event: Engineering Geology, v. 58, no. 3-4, p. 231-249, https://doi.org/10.1016/S0013-7952(00)00037-5.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Statiscal analysis of an earthquake-induced landslide distribution - The 1989 Loma Prieta, California event |
| Series title | Engineering Geology |
| DOI | 10.1016/S0013-7952(00)00037-5 |
| Volume | 58 |
| Issue | 3-4 |
| Year Published | 2000 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Engineering Geology |
| First page | 231 |
| Last page | 249 |