Tsunami 😊 Flashcards

1
Q

What does the size of tsunami waves depend on?

A
  • cause of the wave
  • the distance travelled
  • water depth
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2
Q

What will the wave do over time?

A

It will retreat and increase in size

They compress together

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3
Q

What causes a tsunami? X2

A

Ocean floor is uplifted due to seismic activity

The water is displaced

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4
Q

Negatives of a tsunami? X5

A
  • cause destruction for several miles
  • ruin the land/ soil
  • cause deaths and injuries
  • contaminates food and water supplies
  • diseases and illnesses spread
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5
Q

Can you predict tsunamis?

What can you do?

A

No way to predict them

Can give people early warning

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6
Q

What ways can give people early warning signs?

A
  • tsunami early warning systems are in place in the Pacific and Indian oceans
  • use seismic sensors to detect undersea earthquakes
  • DART system ( Deep-ocean Assessment and Reporting of Tsunami)
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7
Q

How does a DART system work? X5

A
  • uses sea bed sensors and surface buoys to monitor pressure change
  • when waves are detected information is sent back via satellites
  • stations review the info
  • uses computer modelling to estimate the size and direction of tsunami
  • people at risk are warned
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