Earthquakes

What is an epicenter? 

• Where an earthquake started
• The surface right above where an earthquake started 

What is a fault?

• A crack in a plate.
• Where two plates move toward each other.

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

Which travels fastest, always being the first detected by seismic stations?

• P waves
• S waves

An instrument that detects and measures earthquakes is a 

• seismogram
• focus seismic map
• focus
• seismograph 

Most earthquakes happen along the _________________. 

• coast
• faults
• desert
• directions

Earthquakes under the water can cause _________________________________.

• tornadoes
• tsunamis
• lightening
• hailstorms

P-wave 

• The center of a earthquake. 
• Also know as shear or secondary wave. 
• Always the first to arrive;  seismic wave that causes particles of rock to move in back-and-forth direction
• Hilbert

Many earthquakes happen along the borders of...

• Countries
• Tetonic Plates
• Climate Zones
• None of the above.

Smaller earthquakes that occur in the same area after a larger earthquake has occurred.

• aftershock
• liquefaction
• tsunami