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The resolving power of coseismic surface displacement data for fault slip distribution at depth
Author(s) -
Bos Annemarie G.,
Spakman Wim
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl017946
Subject(s) - geodetic datum , geology , geodesy , inverse theory , slip (aerodynamics) , inversion (geology) , seismology , high resolution , tectonics , remote sensing , deformation (meteorology) , physics , oceanography , thermodynamics
The spatial slip distribution of the August 17, 1999, Izmit (Turkey) earthquake has previously been determined from both geodetic and seismological data. Though the models derived agree on a broad scale, they are significantly different in detail. These differences could be due to the inversion techniques applied and/or additional constraints implemented and/or be due to poor resolution. It is also conceivable that the relative agreement at larger scales results in part from a resolution artifact common to all models. To investigate this we perform a resolution analysis of fault slip models based on the inversion of surface displacement data. Assuming the theory of elastic dislocations in a half‐space and adopting a parameterization for which model predictions are capable of fitting the spatial variations of the data, the inverse problem proves to be intrinsically ill‐conditioned.