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vacuum effect
When it does, it produces a(n) ________ that sucks coastal water seaward and exposes harbor and sea floors.
deep ocean
In ________, tsunami waves may appear only a foot or so high.
Pacific Oceans
Most tsunamis- about 80 percent- happen within the ________ "Ring of Fire, "a geologically active area where tectonic shifts make volcanoes and earthquakes common.
Rikuzentakata
More than 1, 500 people died in ________, one of several towns eradicated by a tsunami that hit Japan.
Tsunamis
________ may also be caused by underwater landslides or volcanic eruptions.
305 meters
A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (________), onto land.
ocean floor
When the ________ at a plate boundary rises or falls suddenly, it displaces the water above it and launches the rolling waves that will become a tsunami.
Note 
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