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An alternative method for fault‐plane solutions from a single station
Author(s) -
Ingate Shane F.
Publication year - 1983
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/gl010i007p00497
Subject(s) - seismogram , fault plane , rake , geology , seismology , trigonometry , shear (geology) , trigonometric functions , fault (geology) , slip (aerodynamics) , plane (geometry) , algorithm , geodesy , geometry , computer science , mathematics , physics , petrology , paleontology , thermodynamics
An alternative to the method of Langston (1982) for determining fault‐plane solutions from a single 3‐component seismic station is proposed. The method calculates synthetic P and SH seismograms for three basic orientations of a shear dislocation embedded in a plane layered Earth model, and uses least‐squares to minimise the error between the observed data and a linear sum of the synthetic seismograms. The result is five trigonometric functions of fault strike θ, fault dip δ, and rake of the slip vector λ. When applied to the Borrego Mountain event of 9 April 1968, the method provides a solution which is in close agreement with well‐constrained studies of the main shock.