Earthquake + Tsunami Study Guide | Baamboozle - Baamboozle

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How much did the Sumatra earthquake shorten the day?

3 millionths of a second

What type of fault does a shearing cause?

strike-slip

What was the intensity of the Sumatra earthquake?

9.3

How many minutes did the Sumatra earthquake last?

4 minutes

Define focus:

the point where the rocks break

What do earthquake dangers include?

tsunamis/flood, damaged houses, fire, loss of life, landslides/avalanches

Do tsunamis travel as one single wave or not?

They are a series of waves created by an underwater disturubance such as an earthquake, landslide, volcanic eruption or meteorite.

Which 2 plates were involved in the 2004 Sumatra earthquake?

Burmese Plate + Indian Plate

What causes a normal fault?

a tensional stress

Why are tsunamis so deadly?

They surge forward like a flood and the volme of the H2O is extremely great and there can be more than one wave.

What year did the Sumatra earthquake occur?

2004

What is tensional force?

stress that stretches a rock so it becomes thinner in the middle

What can an earthquake that occurs at the bottom of the ocean floor cause?

tsunami

What is the name of the instrument that measures earthquake intensity?

seismograph

What are the 4 possible causes of a tsunami?

earthquake, volcanic eruptions, landslides, meteorites

How many mph can a tsunami travel?

500mph

What plate boundaries do tsunamis occur at?

convergent

Define epicenter

point on the surface of the Earth above an earthquake

What type of fault does a tensional stress cause?

normal fault or shear stress

What causes a reverse fault?

compressional stress

What causes a strike slip?

shearing stress

What is stress?

A force that acts on rock to change it's shape

What is the earth's crust broken up into?

tectonic plates

What type of fault does compressional stress cause?

reverse fault

What is compressional force?

stress that squeezes a rock until it folds or breaks