Hazards Resulting From Earthquakes

Question 1

Where do shockwaves erupt from?

Answer 1

Earthquakes focus erupting huge ripples onto the surface.

These land waves that occur close to the epicentre which cause the most damage.

Question 2

How do we know the severity of the earthquake?

Answer 2

By its magnitude, distance from epicentre and local geological conditions.

Question 3

Name some secondary effects earthquakes can trigger?

Answer 3

Rock falls.
Landslides,
Avalanches.
All can take as many lives as the original earthquake.

Question 4

What are the shockwaves measured on?

Answer 4

Seismograph.

Question 5

Name 6 factors which the severity of the earthquake depends on.

Answer 5

Strength of earthquake.
Depth of focus.
Nature of bedrock.
Building design.
Population distribution.
Wealth of country.

Question 6

Regarding the focus of the earthquake which earthquakes cause the most damage?

Answer 6

Shallow focus ones resulting is most damaging shock waves.

Question 7

How does the bedrock depend on the severity of the earthquake?

Answer 7

Solid rock withstand shaking better than sand and clays, which turn to jelly causing buildings to topple.

Question 8

What does liquefaction mean?

Answer 8

saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking

Question 9

What is a negative about population distribution?

Answer 9

Nearly half the world’s largest cities are located in earthquake prone areas. Most are on coasts with a threat of tsunamis.

Question 10

How to wealthy countries have an advantage?

Answer 10

Good communications and can afford stockpile emergency supplies of water, food and medicines.