Landslides triggered by the 2002 Denali fault, Alaska, earthquake and the inferred nature of the strong shaking
Earthquake Spectra
By: R.W. Jibson, E. L. Harp, W. Schulz, and D. K. Keefer
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Abstract
The 2002 M7.9 Denali fault, Alaska, earthquake triggered thousands of landslides, primarily rock falls and rock slides, that ranged in volume from rock falls of a few cubic meters to rock avalanches having volumes as great as 15 ?? 106 m3. The pattern of landsliding was unusual; the number of slides was less than expected for an earthquake of this magnitude, and the landslides were concentrated in a narrow zone 30-km wide that straddled the fault rupture over its entire 300-km length. The large rock avalanches all clustered along the western third of the rupture zone where acceleration levels and ground-shaking frequencies are thought to have been the highest. Inferences about near-field strong shaking characteristics drawn from the interpretation of the landslide distribution are consistent with results of recent inversion modeling that indicate high-frequency energy generation was greatest in the western part of the fault rupture zone and decreased markedly to the east. ?? 2004, Earthquake Engineering Research Institute.
Suggested Citation
Jibson, R., Harp, E.L., Schulz, W., Keefer, D.K., 2004, Landslides triggered by the 2002 Denali fault, Alaska, earthquake and the inferred nature of the strong shaking: Earthquake Spectra, v. 20, no. 3, p. 669-691, https://doi.org/10.1193/1.1778173.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Landslides triggered by the 2002 Denali fault, Alaska, earthquake and the inferred nature of the strong shaking |
| Series title | Earthquake Spectra |
| DOI | 10.1193/1.1778173 |
| Volume | 20 |
| Issue | 3 |
| Publication Date | August 01, 2004 |
| Year Published | 2004 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Earthquake Spectra |
| First page | 669 |
| Last page | 691 |