Chapter3-1-3

The epicenter of an earthquake is

• The point below the surface where rock begins to break and the first motion occurs
• The seismic station closest to the earthquake
• The place where the greatest damage occurs
• The point on the surface directly above the focus

This famous transform fault is located in the western United States creates significant earthquake activity for California

• Sierra Nevada Seismic Zone
• Denali Fault
• San Fransisco 
• San Andreas

The Richter scale measures:

• the amount of radon gas released
• the damage caused
• the strength of an earthquake
• the weight of tectonic plates

An instrument that detects and measures earthquakes is a 

• seismogram
• focus seismic map
• focus
• seismograph 

The focus of an earthquake is

• The point (below Earth's surface) where rock breaks
• The closest seismic station
• The place where the greatest damage occurs
• A fault

Which kind of wave arrives at seismic stations second?

• P (primary)
• S (secondary)
• L (love)
• R (rayleigh)

A break in the lithosphere along which movement has occurred is a(n)

• fault
• earthquake
• epicenter
• volcano

The motion caused by earthquakes travels outward from the focus in the form of

• Electromagnetic waves
• Seismic waves
• Gravity waves
• Chemical energy

You use a travel-time graph (difference in P and S Wave arrival times) to find:

• Distance to epicenter
• Distance to fault
• Distance to core

What is the shaking of the Earth’s crust caused by a release of energy?

• Earthquake
• Epicenter
• Fault
• Plate