A teleseismic study of the 2002 Denali fault, Alaska, earthquake and implications for rapid strong-motion estimation
Earthquake Spectra
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Abstract
Slip histories for the 2002 M7.9 Denali fault, Alaska, earthquake are derived rapidly from global teleseismic waveform data. In phases, three models improve matching waveform data and recovery of rupture details. In the first model (Phase I), analogous to an automated solution, a simple fault plane is fixed based on the preliminary Harvard Centroid Moment Tensor mechanism and the epicenter provided by the Preliminary Determination of Epicenters. This model is then updated (Phase II) by implementing a more realistic fault geometry inferred from Digital Elevation Model topography and further (Phase III) by using the calibrated P-wave and SH-wave arrival times derived from modeling of the nearby 2002 M6.7 Nenana Mountain earthquake. These models are used to predict the peak ground velocity and the shaking intensity field in the fault vicinity. The procedure to estimate local strong motion could be automated and used for global real-time earthquake shaking and damage assessment. ?? 2004, Earthquake Engineering Research Institute.
Suggested Citation
Ji, C., Helmberger, D., and Wald, D., 2004, A teleseismic study of the 2002 Denali fault, Alaska, earthquake and implications for rapid strong-motion estimation: Earthquake Spectra, v. 20, no. 3, p. 617-637, https://doi.org/10.1193/1.1778388.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | A teleseismic study of the 2002 Denali fault, Alaska, earthquake and implications for rapid strong-motion estimation |
| Series title | Earthquake Spectra |
| DOI | 10.1193/1.1778388 |
| 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 | 617 |
| Last page | 637 |