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VERSION:2.0
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UID:08d631f8-0e7a-4811-a98d-f5fb8a88c64d@nexttoyou
DTSTAMP:20261105T160610Z
DTSTART:20261105T173000Z
DTEND:20261105T183000Z
SUMMARY:Carter Lecture Series: Dr. Harold Tobin\, "How the Structure of th
 e Cascadia Accretionary Wedge Controls Shallow Megathrust Locking and tsu
 nami-inducing Slip"
LOCATION:Research and Operations Center (ROC) 2.103\, 17217 Waterview Pkwy
  #1.202\, Dallas\, TX 75252
DESCRIPTION:Dr. Harold Tobin\, Professor of Earth and Space Scienecs at th
 e University of Washington\, presents "How the Structure of the Cascadia 
 Accretionary Wedge Controls Shallow Megathrust Locking and tsunami-induci
 ng Slip"\n\nAbstract: Using recent geophysical imaging of the offshore pa
 rt of the Cascadia subduction zone at a range of scales\, the evidence fo
 r recent activity of splay faults and the shallow megathrust can be newly
  evaluated. Central Cascadia off Washington and Oregon features a wide an
 d flat wedge dominated by widely-spaced backthrusts\, known as the landwa
 rd-vergent zone. A synthesis of geology\, geodesy\, and mechanical analys
 is leads to the conclusion that this major portion of Cascadia is effecti
 vely locked right to the deformation front offshore\, and that the most l
 ikely scenario for both past and future Cascadia magnitude 9 class events
  is a large-slip rupture of the megathrust\, with slip extending efficien
 tly up-dip to the frontal tip of the décollement fault and branching onto
  multiple frontal landward-verging splay faults. Furthermore\, the existe
 nce and large-scale structure of the landward vergent zone is direct evid
 ence of seismic rupture rather than aseismic slip. The implications for t
 sunami generation in a future Cascadia "Big One" will be explored.\n\nThi
 s seminar is part of the Dr. james Carter Lecture Series hosted by the De
 partment of Sustainable Earth Systems Sciences.\n\nhttp://next-to-u.app/e
 vents/08d631f8-0e7a-4811-a98d-f5fb8a88c64d
URL:http://next-to-u.app/events/08d631f8-0e7a-4811-a98d-f5fb8a88c64d
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