Earth Science

Geological Activity from Plate Tectonics Processes

Earthquake Damage

Study Tip
PSL Population, Surface, Liquefaction. These are the indicators of how much damage an earthquake will cause.

Factors that Cause Damage

  • The seismic waves do not cause damage. Usually, other factors such as an earthquake’s size and the type of ground people inhabit will determine the extent of damage. Fires that typically follow earthquakes also add on to earthquake damage.
  • Higher population densities cause earthquake to kill more people.
Study Tip
PSL Population, Surface, Liquefaction. These are the indicators of how much damage an earthquake will cause.
Study Tip
The same way a person may cast a shadow over another person when they stand under the sun, planets or celestial bodies that have aligned themselves cast shadows over one another as well.
  • Solid bedrock cause less damage than soft bedrocks, since solid bedrocks vibrate less.
  • Liquefaction happens when ground saturated with water acts like quicksand and creates a landslide.

City Planning

Planners map out how much shaking is expected for certain areas, and this can help planners determine where to build new schools and hospitals.

Concept Check
  • What are two factors that determine earthquake damage?
  • What is liquefaction?
  • How does this information help city planners?
mapped for city planning
Expected shaking mapped out for city planning purposes
Concept Check
  • What are two factors that determine earthquake damage?
  • What is liquefaction?
  • How does this information help city planners?