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Bulletin of the Seismological Society of America; February 1975; v. 65; no. 1; p. 133-138
© 1975 Seismological Society of America
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A simplification in the calculation of motions near a propagating dislocation

JOHN BOATWRIGHT and DAVID M. BOORE

DEPARTMENT OF GEOPHYSICS STANFORD UNIVERSITY, STANFORD, CALIFORNIA 94305

Abstract

From Haskell's (1969) integral representations for the near-field displacements due to a propagating strike-slip and dip-slip dislocation, a solution is obtained for a dislocation "line source" by an analytic integration in the direction of the fault propagation. This reduces the numerical integration from a surface integral required for the usual evaluation of the near-field motion, to a one-dimensional integration over the fault width. Since the dislocation function modeled here is a Heaviside step function, these results may be extended to any arbitrary source time-function by convolving these displacements with the time derivative of the desired source function.




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