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GEOREF RECORD

Correction of seismograms for the transfer function of the seismometer

Bruce P. Bogert
Correction of seismograms for the transfer function of the seismometer
Bulletin of the Seismological Society of America (1962) 52 (4): 781-792

Abstract

If digitized seismic data is collected through a seismometer whose transfer function is known, it is not difficult to design a digital filter which will substitute a given band-pass transfer function for that of the seismometer. Various filters of this kind have been applied to digitized records of teleseisms registered on a Benioff short-period vertical seismometer at Chester, New Jersey. After digital filtering on a computer, the resulting data is converted to analog form and recorded on a seismograph drum for visual examination. These records indicate 1) over the frequency range of interest for teleseismic registration, the seismograph may be regarded as a constant leading phase shift of 270 degrees, a 0.33 second time delay, and a phaseless amplitude function, 2) that it may not be easy to improve on the transfer function of the Benioff instrument for the detection of first motion, and 3) that some additional high-pass filtering might improve the signal-to-microseism ratio at times when the 2-4 second microseism level is high.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 52
Serial Issue: 4
Title: Correction of seismograms for the transfer function of the seismometer
Author(s): Bogert, Bruce P.
Pages: 781-792
Published: 1962
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
Accession Number: 1962-006925
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1962
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