DOI: 10.1785/bssa0570020173. Attenuation of earthquake generated <i>P</i> waves along the western flank of the Andes

Attenuation of earthquake generated P waves along the western flank of the Andes

10.1785/bssa0570020173

Crossref journal-article

Seismological Society of America (SSA)

Bulletin of the Seismological Society of America (790)

Abstract

abstract The attenuation of longitudinal body waves generated by local shocks in southern Peru was investigated. Thirty-four shocks, with focal depths between 20 and 180 km, were used in the study of attenuation as a function of depth and as a function of frequency (1-30 cps). Shocks were recorded on magnetic tape at three stations along the western flank of the Andes. The dimensionless specific attenuation factor Q was computed from measurements of the relative change in shape of P-particle velocity spectra with distance from the source. Near surface effects on amplitudes were taken into account. It was found that: Qp(1.5-15 cps) &gt; 1 × 103; the attenuation of P waves increases markedly above 15 cps, probably due to scattering losses; and although absolute Qp values as a function of depth could not be resolved, an increase in P wave attenuation at a depth of about 80 km is suggested. Vp/Vs, determined from S-P and P readings at seven stations for 150 shocks, is significantly higher for oceanic shocks than inland shocks.

Bibliography

Sumner, R. D. (1967). Attenuation of earthquake generated P waves along the western flank of the Andes. Bulletin of the Seismological Society of America, 57(2), 173â190.

Authors 1

Roger D. Sumner (first)

References 11 Referenced 13

{'issue': 'No. 57', 'key': '2021071416344068200_BIB1', 'first-page': '106', 'article-title': 'Seismic studies', 'author': 'Aldrich', 'year': '(1958)', 'journal-title': 'Carnegie Inst. of Washington Year Book'} / Carnegie Inst. of Washington Year Book / Seismic studies by Aldrich ((1958))
10.1029/JZ070i006p01441 / J. Geophys. Res. / Attenuation of seismic energy in the upper mantle by Anderson ((1965))
10.1130/0016-7606(1954)65[385:OADCSE]2.0.CO;2 / Bull. Geol. Soc. Am. / Orogenesis and deep crustal structure—additional evidence from seismology by Benioff ((1954))
10.1785/BSSA0410020143 / Bull. Seism. Soc. Am. / Revised travel times in southern California by Gutenberg ((1951))
10.1785/BSSA0290040531 / Bull. Seism. Soc. Am. / New evidence for a change in physical conditions at depths near 100 kilometers by Gutenberg ((1939))
{'key': '2021071416344068200_BIB6', 'first-page': '163', 'article-title': "On local character of Poisson's ratio in the earth's crust", 'volume': '29', 'author': 'Kamitsuki', 'year': '(1959)', 'journal-title': 'Mem. Coll. Science, Kyoto Univ.'} / Mem. Coll. Science, Kyoto Univ. / On local character of Poisson's ratio in the earth's crust by Kamitsuki ((1959))
10.1785/BSSA0520040793 / Bull. Seism. Soc. Am. / The San Agustin fault system of southern Peru by Rodriguez ((1962))
{'issue': 'No. 62', 'key': '2021071416344068200_BIB8', 'first-page': '280', 'article-title': 'Seismic studies', 'author': 'Steinhart', 'year': '(1963)', 'journal-title': 'Carnegie Inst. of Washington Year Book'} / Carnegie Inst. of Washington Year Book / Seismic studies by Steinhart ((1963))
Sumner R. (1965). Attenuation of Earthquake Generated P Waves Along the Western Flank of the Andes, Ph.D. thesis, Univ. of Wisconsin.
{'key': '2021071416344068200_BIB10', 'first-page': '97', 'article-title': 'Scattering and attenuation of elastic waves, Part II: Attenuation of elastic waves due to scattering by randomly distributed particles', 'volume': '31', 'author': 'Yamakawa', 'year': '(1962)', 'journal-title': 'Geophys. Mag.'} / Geophys. Mag. / Scattering and attenuation of elastic waves, Part II: Attenuation of elastic waves due to scattering by randomly distributed particles by Yamakawa ((1962))
{'key': '2021071416344068200_BIB11', 'first-page': '627', 'article-title': 'The ratio of the velocity of P and S waves', 'volume': '35', 'author': 'Yoshiyama', 'year': '(1957)', 'journal-title': 'Bull. Earthquake Res. Inst., Tokyo'} / Bull. Earthquake Res. Inst., Tokyo / The ratio of the velocity of P and S waves by Yoshiyama ((1957))

Dates

Type	When
Created	4 years, 1 month ago (July 14, 2021, 12:34 p.m.)
Deposited	4 years, 1 month ago (July 14, 2021, 12:35 p.m.)
Indexed	1 year, 1 month ago (July 26, 2024, 3:54 a.m.)
Issued	58 years, 5 months ago (April 1, 1967)
Published	58 years, 5 months ago (April 1, 1967)
Published Online	58 years, 5 months ago (April 1, 1967)
Published Print	58 years, 5 months ago (April 1, 1967)

Funders 0

None

BibTeX

@article{Sumner_1967, title={Attenuation of earthquake generated P waves along the western flank of the Andes}, volume={57}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0570020173}, DOI={10.1785/bssa0570020173}, number={2}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={Sumner, Roger D.}, year={1967}, month=apr, pages={173–190} }

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