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An optimum data editing technique for the reduction of noise in multi-channel geophysical data

P. A. TYRASKIS^*, O. G. JENSEN, D. E. SMYLIE and J. A. LINTON

LABORATORY IN APPLIED GEOPHYSICS MCGILL UNIVERSITY, MONTREAL, QUEBEC, Canada, H3A 2A7

Abstract

We develop a data editing method, for the optimum interpolation of multichannel time series containing time-coincident data gaps, in one, several, or all channels based upon the autoregressive data model. The method is applied to a set of very long-period seismic data recorded during the 19 August 1977 Indonesian earthquake, which shows several unassociated bursts of noise. Spectral analysis following editing and interpolation of the record indicates existence of systematic signals with periods higher than 1 hr and perhaps as long as 2 hr. The individual spectral peaks in this subseismic band have not been identified.

Footnotes

^* Present address: Dome Petroleum Ltd., P.O. Box 200, Calgary, Alberta, Canada, T2P 2H8.

Present address: Department of Earth and Atmospheric Sciences, York University, Toronto, Canada M3J 1P3.

Present address: Glenayre Electronics Ltd., 1551 Columbia Street, North Vancouver, Canada Y7J 1A3.