Open AccessElastic finite‐difference modelling and imaging for earthquake sources
Author(s) -
Hu LiangZie,
McMechan George A.
Publication year - 1988
Publication title -
geophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0952-4592
DOI - 10.1111/j.1365-246x.1988.tb00469.x
Subject(s) - seismogram , geology , extrapolation , seismology , subduction , orientation (vector space) , finite difference , geophysical imaging , seismic migration , fault (geology) , rift , synthetic data , geodesy , geometry , algorithm , mathematical analysis , tectonics , computer science , mathematics
Summary 2‐D modelling and imaging of line double‐couple and spatially extended earthquake sources is demonstrated. Extrapolation of two‐component (elastic) wavefields is implemented using finite differences. Running the extrapolatioin forward in time produces synthetic seismograms; running it backward in time produces an image of the source. Provided that the recording aperture is adequate, the source location, extent, orientation and radiation pattern may be recovered from the data. Synthetic examples include a normal fault at the edge of a rift, a reverse fault in a subduction zone and a line double couple in a cylindrical, whole‐earth model.