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  1. 防災科研関係論文

3-DIMENSIONAL Q STRUCTURE BENEATH THE KANTO-TOKAI DISTRICT, JAPAN

https://nied-repo.bosai.go.jp/records/4217
https://nied-repo.bosai.go.jp/records/4217
5a7b79ae-98b9-48cb-aef6-0f2921e2fcfc
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル 3-DIMENSIONAL Q STRUCTURE BENEATH THE KANTO-TOKAI DISTRICT, JAPAN
言語
言語 eng
著者 S SEKIGUCHI

× S SEKIGUCHI

en S SEKIGUCHI

Search repository
抄録
内容記述タイプ Other
内容記述 The Q structure of the upper mantle beneath the Kanto-Tokai district, central Japan, where the Eurasian, Pacific and Philippine Sea plates are converging, is investigated from seismic P- and S-wave spectral ratios by means of a three-dimensional (3-D) inversion method. It is found that the subducting Philippine Sea and Pacific plates are characterized by high-Q zones. A high-Q zone also exists between the Philippine Sea plate and the Pacific plate, to the east of the volcanic front. On the other hand, a low-Q zone in the uppermost mantle extends westward horizontally from the volcanic front under the Philippine Sea plate, and appears to exist over the wedge mantle beneath the western Tokai district. A very low Q value obtained here is roughly equal to the average Q value in the low-velocity layer derived from surface wave and free oscillation data. A low-Q region that suggests a magma chamber under active volcanoes is not detected in the crust.
言語 en
書誌情報 en : TECTONOPHYSICS

巻 195, 号 1, p. 83-104
出版者
言語 en
出版者 ELSEVIER SCIENCE BV
ISSN
収録物識別子タイプ ISSN
収録物識別子 0040-1951
DOI
関連識別子 10.1016/0040-1951(91)90145-I
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