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Russian Geology and Geophysics

2005 year, number 7

DETECTION OF SEISMIC SOURCES AT HIGH NOISE BY EMISSION TOMOGRAPHY

Yu.A. Kugaenko
RAS Geophysical Surveys, Kamchatka Filial, 9 Piip blv.,
683006, Petropavlovsk-Kamchatsky, Russia
Keywords: Seismology, seismic emission, emission tomography
Pages: 746-757

Abstract

Numerical modeling using the semblance parameter has demonstrated high efficiency and noise immunity of emission tomography in reconstructing the spatial distribution of small seismic sources in the crust at single-component acquisition. High noise of additive (low signal/noise ratio) and parametric (lateral inhomogeneities) origin deteriorates the quality of source imaging but does not rule out the possibility to create the image. The modeling implies signals limited within a certain estimated frequency bandwidth.