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Deep-borehole-measured Q (sub p) and Q (sub s) attenuation for two Kanto sediment layer sites

Shigeo Kinoshita
Deep-borehole-measured Q (sub p) and Q (sub s) attenuation for two Kanto sediment layer sites
Bulletin of the Seismological Society of America (February 2008) 98 (1): 463-468

Abstract

Using a comparison between a direct body-wave phase and its surface-reflected phase recorded on the same deep-borehole seismogram, 1/Q (sub P) (f) and 1/Q (sub S) (f) were measured in the frequency range from 1 to 10 Hz in a sedimentary layer-basement system at the SHM and FCH stations in the Kanto region, Japan. Estimated values of 1/Q (sub P) (f) and 1/Q (sub S) (f) decrease linearly with increasing frequency at low frequencies. This frequency dependence weakens with increasing frequency. The frequency points at which these two characteristics intersect are approximately 4 and 2 Hz for 1/Q (sub P) (f) and 1/Q (sub S) (f), respectively. The relation of Q (sub S) (f)/Q (sub P) (f)> or =1 was measured over the frequency range from 1 to 10 Hz. However, Q (sub S) (f)/Q (sub P) (f) is in the range of 1.5-3 for frequencies lower than 3 Hz and Q (sub S) (f)/Q (sub P) (f) nearly equal 1 for frequencies higher than 4 Hz.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 98
Serial Issue: 1
Title: Deep-borehole-measured Q (sub p) and Q (sub s) attenuation for two Kanto sediment layer sites
Author(s): Kinoshita, Shigeo
Affiliation: Yokohama City University, Yokomama, Japan
Pages: 463-468
Published: 200802
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 16
Accession Number: 2008-069990
Categories: Environmental geologySeismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch map
N35°38'60" - N35°46'60", E139°30'00" - E140°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200818
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