Open AccessSurface Displacements in an Elastic Half Space due to a Buried Moving Point Source
Author(s) -
Roy Arabinda
Publication year - 1975
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1975.tb07052.x
Subject(s) - point source , line source , supersonic speed , seismogram , physics , conical surface , surface (topology) , displacement (psychology) , half space , free surface , classical mechanics , point (geometry) , amplitude , mechanics , geometry , geology , optics , mathematics , seismology , psychology , psychotherapist
Summary Exact expression for the surface displacement in an elastic half space due to a buried moving point source has been derived. The disturbance is generated by a point source moving along a line inclined to the free surface with a constant velocity. Both the supersonic and subsonic cases are considered. Effect of the moving source on the surface displacement is discussed in detail. Theoretical seismograms for both supersonic and subsonic sources are constructed and compared with those of the stationary source. Results show that surface displacements for a subsonic source differ only in the relative amplitude from those for a stationary source. In case of a supersonic source additional conical phases appear on the surface and surface displacements are significantly different from those of the stationary source.