HR: 0800h
AN: S51B-0510    [Abstracts]
TI: Frequency Domain Inversion Of The 2003 Chengkung Earthquake: Resolutions And Uniqueness Analysis
AU: * Lin, H
EM: Hsin-I.Lin@obs.ujf-grenoble.fr
AF: LGIT, Universite Joseph Fourier/CNRS, LGIT - BP 53, Grenoble cedex 9, 38041, France
AU: Cotton, F
EM: fcotton@obs.ujf-grenoble.fr
AF: LGIT, Universite Joseph Fourier/CNRS, LGIT - BP 53, Grenoble cedex 9, 38041, France
AU: Chang, C
EM: gensin@ss2.cwb.gov.tw
AF: Central Weather Bureau, No. 64, Gongyuan Road, Taiepi, 10048, Taiwan
AB: The Mw 6.5 Chengkung Earthquake occurred in eastern Taiwan at 04:38 UTC on 10 December 2003, which provided large amount seismic records. Close strong motion records with good quality site condition, broadband data, and GPS coseismic data are used to constrain the evolution of the slip on the fault plane in time and space. According to the aftershocks distribution, we adopt a two-plane fault geometry extending from epicenter with 45 and 60 degree dip. Green¡¦s functions have been calculated using a discrete wavenumber method. Frequency domain inversion procedure is used to retrieve source distributions. Resolutions of using different data set will be discussed. Ground motion seismogram within the frequency 0-1 Hz are usually used by kinematic inversions. Dataset gives the opportunity to evaluate the short distance variability in this frequency band. We discuss the impact of such variability in the resulted inversion uniqueness.
DE: 0545 Modeling (4255)
DE: 3225 Numerical approximations and analysis (4260)
DE: 3260 Inverse theory
DE: 7215 Earthquake source observations (1240)
SC: Seismology [S]
MN: 2007 Fall Meeting