Geologic Activity and Earthquake

The point within the earth where rock is under stress is called _________________________.

• Focus

• Epicenter

The point directly above the focus on the surface is called ___________________.

• Epicenter

• Hypocenter

Which type of wave is the first to arrive after an earthquake occurs?

• P Wave

• Rayleigh Wave

• S Wave

• Shear Wave

Which body waves cause particles of rock material to move at right angles to the direction in which the waves are traveling?

• Body Waves

• P Waves

• S Waves

• Surface Waves

What is another term for P Wave?

• Compression Wave

• Principal Wave

• Shear Wave

• Secondary Wave

What year did the strongest earthquake in Indonesia happen?

• 2003

• 2004

• 2005

• 2006