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Wedge Inelasticity and Fully Coupled Models of Dynamic Rupture, Ocean Acoustic Waves, and Tsunami for Megathrust Earthquakes in the Japan Trench
Wedge Inelasticity and Fully Coupled Models of Dynamic Rupture, Ocean Acoustic Waves, and Tsunami for Megathrust Earthquakes in the Japan Trench
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153039
- ISBN
- 9798346871569
- DDC
- 530
- 저자명
- Du, Yue.
- 서명/저자
- Wedge Inelasticity and Fully Coupled Models of Dynamic Rupture, Ocean Acoustic Waves, and Tsunami for Megathrust Earthquakes in the Japan Trench
- 발행사항
- [Sl] : University of California, San Diego, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 161 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisor: Ma, Shuo.
- 학위논문주기
- Thesis (Ph.D.)--University of California, San Diego, 2024.
- 초록/해제
- 요약In this dissertation I investigate the physics of tsunami generation and seismic/acoustic radiations of two megathrust earthquakes in the Japan Trench. Elastic dislocation theory has been widely used for modeling shallow subduction earthquakes and tsunami generation, but several important observations in the 2011 MW 9.1 Tohoku-Oki earthquake contradict the theory, including diminishing shallow slip observed in the northern Japan Trench from differential bathymetry observations before and after the earthquake where the largest tsunami (up to 40 m) was generated and deficiency in high-frequency radiation associated with large tsunami genesis. The 1896 Sanriku earthquake was a devastating tsunami earthquake with similar characteristics in the northern Japan Trench. Here I test an inelastic wedge deformation hypothesis in explaining these anomalous but important observations. Chapter 1 serves as an introduction to this dissertation. In Chapter 2, inelastic wedge deformation in the thick sediment of northern Japan Trench is shown as a mechanism to produce impulsive tsunami that can explain the extreme runup of the 1896 Sanriku tsunami. Chapters 3 and 4 present models of the 2011 Tohoku-Oki earthquake and 1896 Sanriku earthquake by fully coupling dynamic rupture, ocean acoustic waves, and tsunami with a finite-element code. Inelastic wedge deformation is shown in both earthquakes to cause depletion in high-frequency radiation but efficient tsunami generation with diminishing shallow slip, consistent with the observations. The inelastic deformation hypothesis may be applicable to accretionary and other sediment-rich margins. These results have important implications for tsunami hazard assessment and reduction around the world.
- 일반주제명
- Physics
- 일반주제명
- Engineering
- 키워드
- Tsunami
- 키워드
- Japan Trench
- 기타저자
- University of California, San Diego Geophysics (Joint Doctoral with SDSU)
- 기본자료저록
- Dissertations Abstracts International. 86-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017164741
■00520250211153039
■006m o d
■007cr#unu||||||||
■020 ▼a9798346871569
■035 ▼a(MiAaPQ)AAI31638431
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aDu, Yue.
■24510▼aWedge Inelasticity and Fully Coupled Models of Dynamic Rupture, Ocean Acoustic Waves, and Tsunami for Megathrust Earthquakes in the Japan Trench
■260 ▼a[Sl]▼bUniversity of California, San Diego▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a161 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-06, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisor: Ma, Shuo.
■5021 ▼aThesis (Ph.D.)--University of California, San Diego, 2024.
■520 ▼aIn this dissertation I investigate the physics of tsunami generation and seismic/acoustic radiations of two megathrust earthquakes in the Japan Trench. Elastic dislocation theory has been widely used for modeling shallow subduction earthquakes and tsunami generation, but several important observations in the 2011 MW 9.1 Tohoku-Oki earthquake contradict the theory, including diminishing shallow slip observed in the northern Japan Trench from differential bathymetry observations before and after the earthquake where the largest tsunami (up to 40 m) was generated and deficiency in high-frequency radiation associated with large tsunami genesis. The 1896 Sanriku earthquake was a devastating tsunami earthquake with similar characteristics in the northern Japan Trench. Here I test an inelastic wedge deformation hypothesis in explaining these anomalous but important observations. Chapter 1 serves as an introduction to this dissertation. In Chapter 2, inelastic wedge deformation in the thick sediment of northern Japan Trench is shown as a mechanism to produce impulsive tsunami that can explain the extreme runup of the 1896 Sanriku tsunami. Chapters 3 and 4 present models of the 2011 Tohoku-Oki earthquake and 1896 Sanriku earthquake by fully coupling dynamic rupture, ocean acoustic waves, and tsunami with a finite-element code. Inelastic wedge deformation is shown in both earthquakes to cause depletion in high-frequency radiation but efficient tsunami generation with diminishing shallow slip, consistent with the observations. The inelastic deformation hypothesis may be applicable to accretionary and other sediment-rich margins. These results have important implications for tsunami hazard assessment and reduction around the world.
■590 ▼aSchool code: 0033.
■650 4▼aPhysics
■650 4▼aEngineering
■653 ▼aWedge deformation
■653 ▼aFully coupling dynamic rupture
■653 ▼aOcean acoustic waves
■653 ▼aTsunami
■653 ▼aMegathrust earthquakes
■653 ▼aJapan Trench
■690 ▼a0537
■690 ▼a0605
■71020▼aUniversity of California, San Diego▼bGeophysics (Joint Doctoral with SDSU).
■7730 ▼tDissertations Abstracts International▼g86-06B.
■790 ▼a0033
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164741▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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