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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 ...
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  
Wedge deformation
키워드  
Fully coupling dynamic rupture
키워드  
Ocean acoustic waves
키워드  
Tsunami
키워드  
Megathrust earthquakes
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

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■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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