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A Procedure for Modelling Shallow Dislocation Sources with Tensional Component

The source terms of a tensile dislocation are presented in terms of the wavenumber and circular frequency. Expressions for displacements on the surface of a half-space due to an arbitrary oriented dislocation are also obtained by using the generalized ray method. The result shows that the far-field waveforms contributed by tensile source are different from other sources. Considering that not all large earthquakes can be explained with the shear dislocation model, these expressions may be efficient in analysing some earthquakes.