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Bulletin of the Seismological Society of America; April 1983; v. 73; no. 2; p. 391-404
© 1983 Seismological Society of America
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Dispersion relation extraction by multi-trace analysis

D. J. BUCHANAN and P. J. JACKSON

NATIONAL COAL BOARD, ASHBY ROAD, STANHOPE BRETBY, BURTON-ON-TRENT, STAFFORDSHIRE DE15 OQD England

Abstract

The extraction of dispersion relations from recorded seismograms is commonplace, but usually such analysis is confined to a single trace at a time. In exploration seismology, large numbers of traces are available, and in this paper, methods are developed by which a set of traces can be analyzed to reveal dispersion characteristics, i.e., phase and group velocities, and the linear chirp rate. Knowledge of the latter parameter permits compression of signals as a precursor to high-resolution mapping. The techniques are illustrated using both synthetic and real data, the latter being the Love type waves that propagate in coal seams.






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