Landslides Triggered by the 2002 Denali Fault, Alaska, Earthquake and the Inferred Nature of the Strong Shaking
| Autor: | David K. Keefer, Randall W. Jibson, William H. Schulz, Edwin L. Harp |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Earthquake Spectra. 20:669-691 |
| ISSN: | 1944-8201 8755-2930 |
| DOI: | 10.1193/1.1778173 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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