Attenuation of shear-waves in the lithosphere for frequencies from 0.05 to 25 Hz

Bennett, Hugh F.; Bakun, William H.

doi:10.1016/0031-9201(82)90073-5

Cited by 8 publications

(3 citation statements)

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“…In order to search for the depth dependence of Q-' in the Kanto area, we estimated Q-' for the upper mantle by excluding the earthquakes whose focal depths are shallower than 35 km. The result was equal to that for the whole lithosphere within the standard deviation, however, Q-' values show the same tendency as Bennett & Bakun (1982) to increase with depth (see Table 3). For discriminating the detailed depth dependence, a more complete data set including a sufficient number of shallow earthquakes is necessary.…”

Section: Effect Of the Window Lengthsupporting

confidence: 53%

“…Depth dependence of Q-' Bennett & Bakun (1982) (1982) to increase with depth (see Table 3). For discriminating the detailed depth dependence, a more complete data set including a sufficient number of shallow earthquakes is necessary.…”

Section: Effect Of the Window Lengthmentioning

confidence: 91%

“…Depth dependence of Q-' Bennett & Bakun (1982) analysed the depth dependence of Q.;' for the lithosphere beneath the Kanto area by means of the coda-normalization method. They reported that the frequency dependence of Q,' for the crust (<35 km) is slightly stronger than that for the upper mantle.…”

Section: Effect Of the Window Lengthmentioning

confidence: 99%

See 2 more Smart Citations

Frequency-Dependent Attenuation ofPandSWaves In the Kanto Area, Japan, Based On the Coda-Normalization Method

Yoshimoto

Sato

Ohtake

1993

Geophysical Journal International

193

176

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S U M M A R YW e propose a new method for the simultaneous measurement of P -and S-wave attentuation by extending the conventional coda-normalization method which had been limited to the estimation of S-wave attenuation. Using this method, we measured frequency-dependent attenuation of both P a n d S waves in the lithosphere beneath the Kanto area, Japan, from seismograms of 174 local earthquakes for the frequency range 1.5 5 f 5 24 Hz. T h e values of Q;' and Q;' corresponding t o peak amplitude decays show strong frequency dependence, a n d are expressed by using power laws Q,' = 0.012f-')73 and Qp' = 0.031f~0Y5, respectively. T h e ratio Qp'/Q.;' is found t o be larger than unity for the whole frequency range. The apparent attenuations of P and S waves with travel distance are almost the same for frequencies higher than 1 Hz. Our results differ from the characteristics of low-frequency wave attenuation reported by other studies for frequencies lower than 1 Hz. This frequency dependence and the ratio may suggest that scattering loss due t o random heterogeneities in the earth medium plays an important role in seismic-wave attenuation in the lithosphere.

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Section: Effect Of the Window Lengthsupporting

confidence: 53%

Section: Effect Of the Window Lengthmentioning

confidence: 91%