Bulk, shear and scattering attenuation beneath Hawaiian Volcanos and in the oceanic crust extending to the Aloha Cabled Observatory
Bulk, shear and scattering attenuation beneath Hawaiian Volcanos and in the oceanic crust extending to the Aloha Cabled Observatory
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夏威夷火山下方和延伸至阿罗哈有线天文台的洋壳中的体积、切变和散射衰减
DOI:
10.1093/gji/ggaa309
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发表时间:
2020
影响因子:
2.8
通讯作者:
Butler, Rhett
中科院分区:
文献类型:
--
作者:
Butler, Rhett
Seismic attenuation is measured from a swarm of 50 earthquakes in Kīlauea volcano in 2018, associated with caldera collapse. The traverse extends at nearly constant azimuth to the saddle between Mauna Loa and Mauna Kea, continuing to Maui beneath the distal flanks of three dormant volcanos. From Maui the traverse then extends seaward to the Aloha Cabled Observatory (ACO) on the seafloor north of O‘ahu. The effective attenuation is measured with respect to anearthquake source model. Frequency dependentandare derived. The initial path is shallow and uphill, the path to Maui propagates at mid-crustal depths, and the path to ACO extends through oceanic crust. The observations ofover each traverse are modelled as bulk attenuation. Several attenuation processes are observed, including,,, constantQand scattering. The observation of bulk attenuation is ascribed to contrasting physical properties between basalt and water saturated vesicles. The ratio ofQvalues between shallow and mid-crustal propagation is used to derive an activation energyE*for the undetermined shear attenuation mechanism. A Debye relaxation peak is fit to theandobserved for the mid-crustal pathway. A prior high-frequency attenuation study near Wake Island compares well with this HawaiianQdata set, which in general shows lower values ofQthan observed for Wake.
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影响因子:
2.8
作者:
R. Widmer;G. Masters;F. Gilbert
通讯作者:
R. Widmer;G. Masters;F. Gilbert
DOI:
10.4294/jpe1952.35.111
发表时间:
1987
期刊:
Journal of physics of the earth
影响因子:
--
作者:
D. Walker;C. Mccreery
通讯作者:
D. Walker;C. Mccreery
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
R. Butler;C. Mccreery;L. Frazer;D. Walker
通讯作者:
D. Walker
影响因子:
3.3
作者:
R. Butler
通讯作者:
R. Butler
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
R. Butler
通讯作者:
R. Butler