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  1. D300 大学院環境学研究科
  2. D300a 雑誌掲載論文
  3. 学術雑誌

Transient rheology of the oceanic asthenosphere following the 2012 Indian Ocean Earthquake inferred from geodetic data

http://hdl.handle.net/2237/27250
c2a15b8d-93d2-4546-b7d2-c7befbabe942
名前 / ファイル ライセンス アクション
2017_JAES_OPEN_REPOSITORY.pdf 2017_JAES_OPEN_REPOSITORY.pdf ファイル公開日:2019/10/01 (22.9 MB)
Item type 学術雑誌論文 / Journal Article(1)
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
著者 Pratama, Cecep

× Pratama, Cecep

WEKO 74608

Pratama, Cecep

Search repository
Ito, Takeo

× Ito, Takeo

WEKO 74609

Ito, Takeo

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Sasajima, Ryohei

× Sasajima, Ryohei

WEKO 74610

Sasajima, Ryohei

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Tabei, Takao

× Tabei, Takao

WEKO 74611

Tabei, Takao

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Kimata, Fumiaki

× Kimata, Fumiaki

WEKO 74612

Kimata, Fumiaki

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Gunawan, Endra

× Gunawan, Endra

WEKO 74613

Gunawan, Endra

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Ohta, Yusaku

× Ohta, Yusaku

WEKO 74614

Ohta, Yusaku

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Yamashina, Tadashi

× Yamashina, Tadashi

WEKO 74615

Yamashina, Tadashi

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Ismail, Nazli

× Ismail, Nazli

WEKO 74616

Ismail, Nazli

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Nurdin, Irwandi

× Nurdin, Irwandi

WEKO 74617

Nurdin, Irwandi

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Sugiyanto, Didik

× Sugiyanto, Didik

WEKO 74618

Sugiyanto, Didik

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Muksin, Umar

× Muksin, Umar

WEKO 74619

Muksin, Umar

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Irwan, Meilano

× Irwan, Meilano

WEKO 74620

Irwan, Meilano

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権利
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.
内容記述タイプ Abstract
出版者
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
ISSN
収録物識別子タイプ ISSN
収録物識別子 1367-9120
書誌情報 JOURNAL OF ASIAN EARTH SCIENCES

巻 147, p. 50-59, 発行日 2017-10-01
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
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