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Transient rheology of the oceanic asthenosphere following the 2012 Indian Ocean Earthquake inferred from geodetic data
http://hdl.handle.net/2237/27250
http://hdl.handle.net/2237/27250c2a15b8d-93d2-4546-b7d2-c7befbabe942
名前 / ファイル | ライセンス | アクション |
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2017_JAES_OPEN_REPOSITORY.pdf ファイル公開日:2019/10/01 (22.9 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-01-10 | |||||
タイトル | ||||||
タイトル | Transient rheology of the oceanic asthenosphere following the 2012 Indian Ocean Earthquake inferred from geodetic data | |||||
言語 | en | |||||
著者 |
Pratama, Cecep
× Pratama, Cecep× Ito, Takeo× Sasajima, Ryohei× Tabei, Takao× Kimata, Fumiaki× Gunawan, Endra× Ohta, Yusaku× Yamashina, Tadashi× Ismail, Nazli× Nurdin, Irwandi× Sugiyanto, Didik× Muksin, Umar× Irwan, Meilano |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Asthenosphere | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Lithosphere | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Viscosity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Transient rheology | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | GNSS | |||||
抄録 | ||||||
内容記述 | Postseismic motion in the middle-field (100–500 km from the epicenter) geodetic data resulting from the 2012 Indian Ocean earthquake exhibited rapid change during the two months following the rupture. This pattern probably indicates multiple postseismic deformation mechanisms and might have been controlled by transient rheology. Therefore, the relative contribution of transient rheology in the oceanic asthenosphere and afterslip in the oceanic lithosphere should be incorporated to explain short- and long-term transitional features of postseismic signals. In this study, using two years of post-earthquake geodetic data from northern Sumatra, a three-dimensional spherical-earth finite-element model was constructed based on a heterogeneous structure and incorporating transient rheology. A rheology model combined with stress-driven afterslip was estimated. Our best-fit model suggests an oceanic lithosphere thickness of 75 km with oceanic asthenosphere viscosity values of 1 × 10^17 Pa s and 2 × 10^18 Pa s for the Kelvin and Maxwell viscosity models, respectively. The model results indicate that horizontal landward motion and vertical uplift in northern Sumatra require viscoelastic relaxation of the oceanic asthenosphere coupled with afterslip in the lithosphere. The present study demonstrates that transient rheology is essential for reproducing the rapidly changing motion of postseismic deformation in the middle-field area. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Elsevier | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.jseaes.2017.07.049 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 1367-9120 | |||||
書誌情報 |
en : JOURNAL OF ASIAN EARTH SCIENCES 巻 147, p. 50-59, 発行日 2017-10-01 |
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著者版フラグ | ||||||
値 | author | |||||
URI | ||||||
識別子 | http://doi.org/10.1016/j.jseaes.2017.07.049 | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/27250 | |||||
識別子タイプ | HDL |