Tsunami: Causes
Name at the two MOST COMMON causes of tsunamis
Earthquake, underwater volcanic eruption
crest
highest point of wave
Where is a tsunami the LEAST noticeable?
In the deep, open ocean
Were is the area of the world most likelt to have tsunamis?
The Ring of Fire
How much warning will you ahve before a tsunami strikes?
Only a few minutes
Name two more rare causes of tsunamis.
Sub-marine landslide, meteor activity
trough
lowest point of wave
How fast does a tsunami move in deep water?
about 500 miles per hour!
Whatcounry has the most tsunamis?
Japan
Where should you go in a tsunami?
The highest, sturdiest building possible, as far away as possible.
Do tides cause tsunamis? Explain.
No, because tides are naturally occurring and are impacted by the moon and other natural gravitational forces.
waveheight
Height of the wave from the trough to crest.
Does a wave become greater or smaller when it comes closer to shore?
greater
What is one sign of an aproaching tsunami that you can see?
receeding water, subtle but noticeable increase in water level
The tsunami hits. What is one danger that follows the initial surge of water?
the wave goes back out to sea and drags thigns with it.
What causes normal wave activity?
Winds and tides
wave length
the length of a wave from one crest to the next crest.
How tall are the average tsunami waves in shallow water?
Up to about 100 feet.
What is one sign that you can hear of an approaching tsunami?
strange noises coming from the ocean, a freight train, fighter jet like sound
What is a tsuanmi pd?
explain
What is the Japanese term for Tsunami?
Harbor wave
wave period
The time it takes for the crest of one wave to pass a certain point for the crest of the next wave to pass the same point.
Why does a tsunami get larger the closer it gets to land?
The tsunami wave has less and less room to rebound as it gets closer to shore, so the waves reach greater heights ABOVE the surface.
how long are the wave periods in a tsunami?
5 minutes to one hour.
Name three ways the tsunami pod was tested or three safety features it had.
explain