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Russian Geology and Geophysics

2001 year, number 5

LOW-FREQUENCY DECONVOLUTION OF DIGITAL RECORDS OF A SHORT-PERIOD SEISMOMETER

V. I. Yushin
Keywords: Deconvolution, inverse filtration, true movement, seismometer, digital record of seismograms
Pages: 852-863

Abstract

The classical problem of conversion of seismograms into the true displacement of seismometer case is considered in view of the modern opportunities of digital record and processing of data. Two methods are considered: (1) complete deconvolution that provides reconstitution of residual displacement within a limited time interval and (2) long-period deconvolution that allows conversion of a continuous record of a short-period seismometer into a long-period record in an unlimited time interval. The use of the methods is illustrated by examples in which records of real teleseismic events by a 2-second velocimeter are inverted to seismometers with the own periods tens of times longer.