1973
DOI: 10.1029/jb078i002p00462
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Spectral ratio of short-period ScPand ScSphases in relation to the attenuation in the mantle beneath the Tasman Sea and the Antarctic Region

Abstract: Four pairs of ScP and ScS phases recorded at the station Dumont d'Urville, Adelie Land, at the epicentral distance of about 50°, have been frequency analyzed. The slope of spectral ratio has been utilized to calculate the average value of Qβ in the mantle between the Tasman Sea and the station. With Qα/Qβ = 1.9, we estimate the average value 〈Qβ〉 = 380. This is much higher than the estimation by H. Kanamori of 230 for the mantle beneath southern Arizona and New Mexico.

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Cited by 8 publications
(3 citation statements)
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“…These values are consistent with the very high value we have found beneath the subduction zones in our region 3. A rather high Q has also been found beneath station DRV at Dumont d'Urville on the Antarctic margin (Choudhury & Dorel 1973). Frohlich & Barazangi (1980) have estimated Q in the lower mantle between Fiji-Tonga and Australia from a comparison of (ScP-PcP) and (ScS-PcS) waves, and obtain a value of 1050 at 1 Hz.…”
Section: Comparison With Previous Q-results From Body Wave Analysesmentioning
confidence: 97%
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“…These values are consistent with the very high value we have found beneath the subduction zones in our region 3. A rather high Q has also been found beneath station DRV at Dumont d'Urville on the Antarctic margin (Choudhury & Dorel 1973). Frohlich & Barazangi (1980) have estimated Q in the lower mantle between Fiji-Tonga and Australia from a comparison of (ScP-PcP) and (ScS-PcS) waves, and obtain a value of 1050 at 1 Hz.…”
Section: Comparison With Previous Q-results From Body Wave Analysesmentioning
confidence: 97%
“…This method has several advantages: it directly takes into account source and propagation effects, it allows us to work at a single frequency, and it provides a good control on possible undesirable contributions due to nearby phases, scattered phases, high noise or strong focusing–defocusing effects. This method is applied to the Australian–Antarctic region, where global attenuation models retrieved from surface waves have a limited resolution, and where only few short period ScS wave studies have been performed (Choudhury & Dorel 1973; Frohlich & Barazangi 1980). The region is well sampled by high quality ScS n waves thanks to the deep focus events of the nearby subduction zones, and to the availability of data from several permanent broad‐band stations.…”
Section: Introductionmentioning
confidence: 99%
“…Other methods have involved measuring the spectral content of direct P and S waves from long-period seismometers (Solomon and ToksSz, 1970;Mikumo and Kurita, 1968;Teng, 1968). A few studies have used P waves recorded on shortperiod instruments (Kanamori, 1967a;Frasier and Filson, 1972) and fewer still have used short-period S waves (Marshall et al, 1975;Kanamori, 1967b;Choudhury and 1013 Dorel, 1973). Marshall et al (1975) pointed out that the short-period teleseismic S waves merited much closer examination because the effect of anelastic attenuation on them is overwhelming.…”
Section: Introductionmentioning
confidence: 99%