EAPs 106 Exam 2 UNIT 4 Tsunamis
Questions With Outlined Answers
\Q\.What is the most common mean of generating a tsunami? - ANSWERS✔-Uplift of the
seafloor from elastic rebound during a large subduction zone earthquake.
\Q\.How do tsunami and wind-blown waves differ? - ANSWERS✔-Tsunami waves can have
similar heights to large wind blown waves, but they carry a much larger volume of water, have
much longer wavelength (distance from crest to crest), and travel much further inland.
\Q\.What are the characteristics of a tsunami wave in deep water versus how it is when it hits
shallow water? - ANSWERS✔-In deep water, tsunami waves have long wavelengths (distance
from crest to crest), low wave heights, and great speed (jetliner speed). When waves approach
shore they slow down (car driving through campus speed), which causes back of waves to catch
up the front, reducing wavelength, but increasing wave height.
\Q\.When do tsunami water waves break? - ANSWERS✔-Tsunami waves (like all water waves)
break when the wave height is about equal to the water depth
\Q\.Which types of earthquakes will and will not cause tsunamis? - ANSWERS✔-Distant
earthquakes, local earthquakes, landslides, volcanic eruptions, asteroid impact will all cause
tsunamis. Earthquakes at transform faults will not cause tsunamis.
\Q\.How do we know about past tsunamis in Japan and along the Washington/Oregon coast? -
ANSWERS✔-Dozens of Tsunami Stones along the coast of Japan warn residents not to build
below them. Some are more than 600 years old. Our own tsunami stones are written in sand
deposits along the entire coast of the Pacific Northwest
Questions With Outlined Answers
\Q\.What is the most common mean of generating a tsunami? - ANSWERS✔-Uplift of the
seafloor from elastic rebound during a large subduction zone earthquake.
\Q\.How do tsunami and wind-blown waves differ? - ANSWERS✔-Tsunami waves can have
similar heights to large wind blown waves, but they carry a much larger volume of water, have
much longer wavelength (distance from crest to crest), and travel much further inland.
\Q\.What are the characteristics of a tsunami wave in deep water versus how it is when it hits
shallow water? - ANSWERS✔-In deep water, tsunami waves have long wavelengths (distance
from crest to crest), low wave heights, and great speed (jetliner speed). When waves approach
shore they slow down (car driving through campus speed), which causes back of waves to catch
up the front, reducing wavelength, but increasing wave height.
\Q\.When do tsunami water waves break? - ANSWERS✔-Tsunami waves (like all water waves)
break when the wave height is about equal to the water depth
\Q\.Which types of earthquakes will and will not cause tsunamis? - ANSWERS✔-Distant
earthquakes, local earthquakes, landslides, volcanic eruptions, asteroid impact will all cause
tsunamis. Earthquakes at transform faults will not cause tsunamis.
\Q\.How do we know about past tsunamis in Japan and along the Washington/Oregon coast? -
ANSWERS✔-Dozens of Tsunami Stones along the coast of Japan warn residents not to build
below them. Some are more than 600 years old. Our own tsunami stones are written in sand
deposits along the entire coast of the Pacific Northwest
