Estimation of Strong Ground Motion from the Great 1964 Mw 9.2 Prince William Sound, Alaska, Earthquake

• DOI: 10.1785/0120070273
• Publication Date: 2008-10-01T13:39:25Z
• Authors: G. P. Mavroeidis; B. Zhang; G. Dong; A. S. Papageorgiou; U. Dutta; N. N. Biswas
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

We are generating physically plausible near-field synthetic ground motions for the great 1964 Prince William Sound, Alaska, earthquake compatible with available seismological data, tectonic information, and eyewitness accounts. The first objective of this study is simulation low-frequency (i.e., f <0.03 Hz) strong on selected locations a dense grid observation points extending over shallow dipping causative fault Alaska earthquake. In order to accomplish task, we utilizing slip model proposed by Johnson et al. (1996) based joint inversion tsunami waveforms geodetic data. calculations carried out using discrete wavenumber representation method (Bouchon Aki, 1977; Bouchon, 1979) generalized transmission reflection coefficient technique (Luco Apsel, 1983).

The second reconstruction motion time histories response spectra that city Anchorage experienced during generated methodology described previously. intermediate-frequency 0.03< <0.50 simulated convolving Green’s functions far-field radiation pulses circular cracks (Sato Hirasawa, 1973; Dong Papageorgiou, 2002a). high-frequency 0.5< <8.0 stochastic modeling approach. three independently derived ground-motion components then properly combined generate broadband due Sound earthquake.

The third validation against observed deformation, estimates inferred from descriptions structural damage, accounts.

In summary, analysis presented in contributes better understanding aspects provides engineering applications all information seismological, tectonic, accounts). It should be noted however not necessarily unique, nor do they reflect entire uncertainty characterizes problem under investigation.