Inelastic strain in the hypocentral region of the 2000 Western Tottori earthquake (M 7.3) inferred from aftershock seismic moment tensors
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- 資料種別
- 記事
- 著者・編者
- Satoshi MatsumotoYoshihisa IioShinichi Sakai
- 出版年月日等
- 2020-05-11
- 出版年（W3CDTF）
- 2020-05-11
- タイトル（掲載誌）
- EPS : Earth, Planets and Space
- 巻号年月日等（掲載誌）
- 72(62)
- 掲載巻
- 72(62)
- ISSN（掲載誌）
- 1880-5981
- ISSN-L（掲載誌）
- 1343-8832
- 本文の言語コード
- eng
- DOI
- 10.1186/s40623-020-01186-2
- 国立国会図書館永続的識別子
- info:ndljp/pid/11520516
- コレクション（共通）
- コレクション（障害者向け資料：レベル1）
- コレクション（個別）
- 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他
- 収集根拠
- オンライン資料収集制度
- 受理日（W3CDTF）
- 2020-08-03T12:00:21+09:00
- 保存日（W3CDTF）
- 2020-08-03
- 記録形式（IMT）
- application/pdf
- オンライン閲覧公開範囲
- 国立国会図書館内限定公開
- デジタル化資料送信
- 図書館・個人送信対象外
- 遠隔複写可否（NDL）
- 可
- 掲載誌（国立国会図書館永続的識別子）
- info:ndljp/pid/11467692
- 連携機関・データベース
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- 要約等
- Inelastic deformation due to seismic activity is an important signal that reflects fault evolution. In particular, aftershock sequences indicate the evolution of damage in a medium that has experienced a large earthquake. Herein, we discuss the inelastic strain rate surrounding the fault that produced the M 7.3 Western Tottori earthquake in 2000 using long-term aftershock analysis. To obtain high-resolution focal mechanisms 18 years after the earthquake occurrence, we conducted dense seismic observations in the focal area. The inelastic strain rate estimated from the aftershock seismic moment tensor data showed spatial variations within a range of 10^<−7>–10^<−11> per year, 18 years after the main shock. By comparing the inelastic strain rates from immediately after the earthquake and 18 years later, we detected the increase in the spatial variations in the inelastic strain rate; the variations are as small as 10^2 (= 10^<−5>/10^<−7>) for the early stage but as large as 10^4 (= 10^<−7>/10^<−11>) for the later period. In addition, the decay of the rate during these two periods varied spatially from spatial bin to bin. Certain bins in the northern segment of the earthquake fault, southern edge of the fault, and surrounding the location of the preceding swarm activity to the M 7.3 event showed slower decay rates than the inverse of the lapse time since the occurrence of the M 7.3 earthquake. We modeled this decay rate change as the relaxation response of a power-law fluid to an elastic strain input from the large earthquake. Most parts of the fault can be explained by this model. However, the areas with low decay rates suggest the presence of a dragging mechanism, such as aseismic slip, at or around these locations.
- DOI
- 10.1186/s40623-020-01186-2
- オンライン閲覧公開範囲
- インターネット公開
- 著作権情報
- Creative Commons Attribution 4.0 International© The Author(s) 2020.
- 関連情報（URI）
- 参照
- Estimation of shallow structure along the hinagu fault by applying seismic interferometry to DAS observations conducted along national route 3 in Kumamoto prefecture, JapanPrevalence of Shallow Low‐Frequency Earthquakes in the Continental CrustSpecial issue "Crustal dynamics : toward integrated view of island arc seismogenesis
- 参照
- Why do aftershocks occur? Relationship between mainshock rupture and aftershock sequence based on highly resolved hypocenter and focal mechanism distributionsSan-in shear zone in southwest Japan, revealed by GNSS observationsInelastic strain rate in the seismogenic layer of Kyushu Island, JapanDecay of aftershock activity for Japanese earthquakesDeformation of an island arc: Rates of moment release and crustal shortening in intraplate Japan determined from seismicity and Quaternary fault dataA New Method for Determining First-Motion Focal MechanismsA Discussion on natural strain and geological structure - The kinetics of rock deformation by pressure solutionEstimation of the stress field in the region of the 2000 Western Tottori Earthquake: Using numerous aftershock focal mechanismsMethod for estimating the stress field from seismic moment tensor data based on the flow rule in plasticity theoryGridding with continuous curvature splines in tensionPhysics-based GPS data inversion to estimate three-dimensional elastic and inelastic strain fieldsDamage and rheology in a fibre-bundle modelBirth of a major strike‐slip fault in SW JapanLate Quaternary to decadal velocity fields in AsiaKinetics of pressure solution creep in quartz: theoretical considerationsAnalysis of aftershocks in a lithospheric model with seismogenic zone governed by damage rheologyS.-I. Karato 2008. Deformation of Earth Materials. An Introduction to the Rheology of Solid Earth. x + 463 pp. Cambridge, New York, Melbourne: Cambridge University Press. Price £45.00, US $90.00 (hard covers). ISBN 9780 521 84404 8.表現定理とグリーン関数（2)ダメージ力学にもとづくレオロジー地震のマグニチュードと余震の起りかたSwarm-like seismic activity in 1989, 1990 and 1997 preceding the 2000 Western Tottori Earthquake超多点稠密地震観測による断層帯発達過程の解明に向けてOn volume-source representations based on the representation theoremOverpressurized fluids drive microseismic swarm activity around Mt. Ontake volcano, Japan
- 連携機関・データベース
- 国立情報学研究所 : CiNii Research
- 提供元機関・データベース
- 学術機関リポジトリデータベース雑誌記事索引データベースCrossref科学研究費助成事業データベースCrossrefCrossrefCrossref
- 書誌ID（NDLBibID）
- 11520516