Multiple Choice for Earthquakes

Which of the following describes the build up and release of stress during an earthquake?

• the Modified Mercalli Scale

• the elastic rebound theory

• the principle of superposition

• the travel time difference

the amount of ground displacement in an earthquake is called the

• epicenter

• dip

• slip

• focus

The point where movement occured which triggered the earthquake is called the

• dip

• epicenter

• focus

• strike

Which of the following equences correctly lists the different arrivals form first to last

• p waves... s waves... surface waves

• surface waves...p waves...s waves

• p waves... surface waves...s waves

• s waves...p waves...surface waves

How do rock particles move during the passage of a P wave through the rock?

• back and forth parallel to the direction of wave travel

• back and forth perpendicular to the direction of wave travel

• in a rolling circular motion

• the particles do not move

How many seismograph stations are needed to locate the epicenter of an earthquake

• 1

• 2

• 3

• 4

Earthquakes can occur with ______ faulting

• normal

• reverse

• thrust

• all of these

Approximately what percentage of earthquakes occur at plate boundaries

• 25%

• 50%

• 75%

• 90%

If only density increases with increasing depth withing the earth, the velocity of a P wave should ______

• stay the same

• increase

• decrease

If a P wave were to go from a solid to a liquid - what would happen to it's velocity?

• stay the same

• increase

• decrease to 0.0

• decrease