Tsunami Warning and Preparedness An Assessment of the U.S. Tsunami Program and the Nation's Preparedness Efforts (2011) / Chapter Skim
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Appendix A: Examples of Tsunami Sources That Threaten the United States
Appendix A: Examples of Tsunami Sources That Threaten the United States
Pages 207-216
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From page 207... ...
Tsunamis most commonly result from slip on the subduction-zone faults that convey one tectonic plate beneath another. Aleutian- The zone's largest 20th-century tsunamis, How often do Aleutian sources spawn Alaskan both on nearby coasts and on distant tsunamis comparable in far-field size subduction ones, were generated during the Aleutian to the tsunamis of 1946 and 1964?
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From page 208... ...
24, 25 Produced earthquake of Mw 8.3 in 2006 Subduction In simulations with unit sources having Is the Japan Trench limited to zone along the 1 m of seismic slip on fault-rupture patches earthquakes as large as those in its written historical record? 26 Japan Trench -- 50 km by 100 km, Crescent City's greatest No measured tsunami threat from the western Pacific earthquake is the subduction zone along the Japan Trench.23 larger than Mw 8.322 Mariana Simulated for earthquakes as large as What is the maximum plausible subduction Mw 9.3 to make hazard assessments for earthquake from the Mariana nearby Guam27 and distant Pearl Harbor.7 zone -- No subduction zone, classically measured considered a place where plates are earthquake weakly coupled and the interplate larger than thrust earthquakes consequently of Mw 7.221 or 7.722 modest size?
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From page 209... ...
Atlantic coast from flank collapse in the Canary Islands, off West Africa.42 Alaskan slides The separate tsunamis from the Chenaga, What do these slides imply for Puget during the 1964 Seward, Valdez, and Whitter slides together Sound deltas as potential tsunami sources? 31 earthquake -- account for 79 of the 106 Alaskan deaths Slides at from tsunamis that the 1964 earthquake Chenaga,43 Kenai triggered (Fig.
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From page 210... ...
Other potential sources probability and size, with its distant Include the Palos include a submarine slide near Santa causes of lesser inundation? Verdes slide, of Barbara and offshore faults with known 0.8 km3 with a or inferred Quaternary displacement.56-61 headscarp 5 km The Palos Verdes slide occurred close to 7,500 years ago.55 off the coast near Los Angeles (Fig.
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From page 211... ...
Atlantic coast occurred at least 5,000 years with an estimated volume of 165 km3, is continental ago, the notable exception being among the largest of these.63 Its simulated shelf -- Cover Canada's Grand Banks slide, one-third of tsunamis originate with peak-to-trough which generated a tsunami that the continental amplitudes of several tens of meters. The took 28 lives in Newfoundland in 1929.65 The Currituck slide dates to slope and rise waves crest about 6 m above sea level as roughly 25,000-50,000 years ago.66 off New England, they overtop the sandy barrier between the one-sixth off the Atlantic Ocean and Currituck Sound, North Probabilities aside, simulating slides Carolina.64 Middle Atlantic, like Currituck requires uncertain and one- estimates of slide size, speed, and eighth off the duration, all factors in the slide's Southeast62 effectiveness at generating a tsunami.64 Slumps and No confirmed tsunamis.
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From page 212... ...
2008. Late Holocene rupture of the northern San Andreas Fault and possible stress linkage to the Cascadia Subduction Zone.
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From page 213... ...
U.S. Geological Survey Professional Paper 0354 C:51-86.
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From page 214... ...
In Earth Science in the Urban Ocean: The Southern California Continental Borderland, Special Paper Geological Society of America 454:291-315, Boulder, Colorado.
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From page 215... ...
U.S. Geological Survey Professional Paper 367:1-98.
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