DOI: 10.1785/bssa0580031021. New techniques for the determination of surface wave phase velocities

New techniques for the determination of surface wave phase velocities

10.1785/bssa0580031021

Crossref journal-article

Seismological Society of America (SSA)

Bulletin of the Seismological Society of America (790)

Abstract

abstract A number of new techniques have been developed for the determination of phase velocities from the digitized seismograms from pairs of stations. One of these techniques is to Fourier analyze the sum (or difference) of the two seismograms after time shifting in steps to correspond to steps in phase velocity. The amplitude of the summed seismogram is a maximum for any particular period when both seismograms are in phase at that period. Another method is to pass both seismograms through a narrow bandpass digital filter centered at various periods and form the cross product of the filtered seismograms, after time shifting. The average of the resultant time series is a maximum when the two signals are in phase. The computer output is a matrix consisting of amplitudes or averages as a function of phase velocity and period. The phase velocity dispersion is determined from the contoured matrix. Using these techniques, interstation phase velocities of Rayleigh waves have been determined for the “World Wide Network Standard Stations” at Pretoria, Bulawayo and Windhoek. The method using cross-products is the most efficient.

Bibliography

Bloch, S., & Hales, A. L. (1968). New techniques for the determination of surface wave phase velocities. Bulletin of the Seismological Society of America, 58(3), 1021â1034.

Authors 2

S. Bloch (first)
A. L. Hales (additional)

References 13 Referenced 47

Alexander S. S. (1963). Surface Wave Propagation in the Western United States, Ph.D. Thesis, Calif. Inst. of Tech.
10.1029/JZ072i014p03613 / J. Geophys. Res. / Structure of the upper mantle under the Western Mediterranean Basin by Berry ((1967))
{'key': '2021071417050556000_BIB3', 'first-page': '207', 'article-title': 'Rayleigh wave studies in South Africa', 'volume-title': 'Report at 48th A. G. U. Annual Meeting, Abstract, Trans. Am. Geophys. Un.', 'author': 'Bloch', 'year': '(1967)'} / Report at 48th A. G. U. Annual Meeting, Abstract, Trans. Am. Geophys. Un. / Rayleigh wave studies in South Africa by Bloch ((1967))
{'key': '2021071417050556000_BIB4', 'first-page': '167', 'article-title': 'Seismic waves and Earth structure in the Canadian Shield', 'volume': '53', 'author': 'Brune', 'year': '(1963)', 'journal-title': 'Bull. Seism. Soc. Am.'} / Bull. Seism. Soc. Am. / Seismic waves and Earth structure in the Canadian Shield by Brune ((1963))
{'key': '2021071417050556000_BIB5', 'first-page': '206', 'article-title': 'Analysis of surface wave dispersion observed in Australia', 'volume-title': 'Report at 48th A. G. U. Annual Meeting, Abstract, Trans. Am. Geophys. Un.', 'author': 'Dziewonski', 'year': '(1967)'} / Report at 48th A. G. U. Annual Meeting, Abstract, Trans. Am. Geophys. Un. / Analysis of surface wave dispersion observed in Australia by Dziewonski ((1967))
10.1007/BF01997639 / Geofisica Pura e Applicata / Transient analysis of earthquake and explosion arrivals by Ewing ((1959))
10.1785/BSSA0540010183 / Bull. Seism. Soc. Am. / A frequency-velocity-energy diagram for the study of dispersive surface waves by Iyer ((1964))
10.1785/BSSA0560051009 / Bull. Seism. Soc. Am. / Structure of the crust and upper mantle in the Alps from the phase velocity of Rayleigh waves by Knopoff ((1966))
10.1111/j.1365-246X.1969.tb00246.x / Recent improvements in the analysis of surface wave observations by Landisman
10.1785/BSSA0540010019 / Bull. Seism. Soc. Am. / Observations of multiple seismic events by Pilant ((1964))
10.1111/j.1365-246X.1965.tb03053.x / Geophys. J. / Appendix to Crampin, S. and M. Båth, Higher modes of seismic surface waves: Mode separation by Robinson ((1965))
{'key': '2021071417050556000_BIB12', 'first-page': '33', 'article-title': 'Analysis of dispersed surface waves by means of Fourier Transform 1', 'volume-title': 'Bull. Earthquake Res. Inst.', 'author': 'Satô', 'year': '(1955)'} / Bull. Earthquake Res. Inst. / Analysis of dispersed surface waves by means of Fourier Transform 1 by Satô ((1955))
10.1029/JZ071i006p01649 / J. Geophys. Res. / Phase velocities of long period surface waves and structure of the upper mantle, 1, great circle Love and Rayleigh wave data by Toksöz ((1966))

Dates

Type	When
Created	4 years, 1 month ago (July 14, 2021, 1:06 p.m.)
Deposited	4 years, 1 month ago (July 14, 2021, 1:06 p.m.)
Indexed	1 year, 1 month ago (July 23, 2024, 3:54 p.m.)
Issued	57 years, 3 months ago (June 1, 1968)
Published	57 years, 3 months ago (June 1, 1968)
Published Online	57 years, 3 months ago (June 1, 1968)
Published Print	57 years, 3 months ago (June 1, 1968)

Funders 0

None

BibTeX

@article{Bloch_1968, title={New techniques for the determination of surface wave phase velocities}, volume={58}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0580031021}, DOI={10.1785/bssa0580031021}, number={3}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={Bloch, S. and Hales, A. L.}, year={1968}, month=jun, pages={1021–1034} }

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