000011343 001__ 11343
000011343 005__ 20141205155901.0
000011343 04107 $$aeng
000011343 046__ $$k2008-10-12
000011343 100__ $$aPetukhin, Anatoly
000011343 24500 $$aEstimation of the Low-Frequency Q-Value (Below 1Hz)

000011343 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011343 260__ $$b
000011343 506__ $$arestricted
000011343 520__ $$2eng$$aStudies that estimate low-frequency Q-value are very scarce. In most of them estimations are made by eye or by trial and error, without any systematic inversion approach. In this study, we propose nonlinear waveform inversion methodology and estimate low-frequency Q-value from the observation data. Results will help us to improve accuracy of the numerical simulations of the long-period waves. The inversion methodology used in this study consists of three steps. Step 1: Compile 1-D velocity models for every observational site in the target area, source region of the 2000 West Tottori earthquake. Step 2: In order to test velocity models, we compared synthetic and observed waveforms. Step 3: Use grid search method to estimate Q-value and linear inversion to estimate corrections to the source and site effects. Results of inversion show that estimated value in low-frequency range, Q = 80-180, agrees well with the results of spectral inversion in high frequency range, in case of a realistic ray-theory geometrical spreading is considered.

000011343 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011343 653__ $$aLong-period ground motions, Q-value, waveform inversion, receiver function

000011343 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011343 720__ $$aPetukhin, Anatoly$$iIrikura, Kojiro$$iOkazaki, Atsushi$$iHada, Koji$$iMiyakoshi, Ken
000011343 8560_ $$ffischerc@itam.cas.cz
000011343 8564_ $$s201637$$uhttps://invenio.itam.cas.cz/record/11343/files/S10-021.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S10-021.
000011343 962__ $$r9324
000011343 980__ $$aPAPER