Experience in recent earthquakes around the world, along with paleoseismologic and dendrochronologic studies in the Pacific Northwest over the past few decades, tell us we can expect the next great (M ~8- 9+) earthquake along the Cascadia subduction zone will result in many regional effects. Which of the following is least likely?

Applications and Investigations in Earth Science (9th Edition)
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ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Experience in recent earthquakes around the world,
along with paleoseismologic and dendrochronologic
studies in the Pacific Northwest over the past few
decades, tell us we can expect the next great (M ~8-
9+) earthquake along the Cascadia subduction zone
will result in many regional effects. Which of the
following is least likely?
seismically induced liquefaction in river bottoms far
upstream of the coastal zone, even up to the
Portland area
subsidence (local to widespread) of a zone of land
along and even somewhat inboard (east) of the
coastline
formation of extensional (normal) scarps along
shallow crustal faults in the Puget Lowland and
Willamette Valley
landslides from coastal bluffs and far inland across
the coastal ranges
tsunami inundation of coastal lands and river
mouths up to tens of meters above sea level
starting within 10 to 30 minutes
Transcribed Image Text:Experience in recent earthquakes around the world, along with paleoseismologic and dendrochronologic studies in the Pacific Northwest over the past few decades, tell us we can expect the next great (M ~8- 9+) earthquake along the Cascadia subduction zone will result in many regional effects. Which of the following is least likely? seismically induced liquefaction in river bottoms far upstream of the coastal zone, even up to the Portland area subsidence (local to widespread) of a zone of land along and even somewhat inboard (east) of the coastline formation of extensional (normal) scarps along shallow crustal faults in the Puget Lowland and Willamette Valley landslides from coastal bluffs and far inland across the coastal ranges tsunami inundation of coastal lands and river mouths up to tens of meters above sea level starting within 10 to 30 minutes
Most major oceanic tsunamis are caused by:
displacement of water by uplift or subsidence of the
ocean floor during faulting
huge submarine volcanic eruptions
sudden strike-slip movement of the seafloor or
continental shelf
earthquake-induced shaking of soft sediments
earthquake (seismic) waves shaking the water near
the epicenter
Transcribed Image Text:Most major oceanic tsunamis are caused by: displacement of water by uplift or subsidence of the ocean floor during faulting huge submarine volcanic eruptions sudden strike-slip movement of the seafloor or continental shelf earthquake-induced shaking of soft sediments earthquake (seismic) waves shaking the water near the epicenter
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