Seismic Waves

Question 1

What is the epicenter of an earthquake?

Answer 1

An earthquake’s epicenter is where the seismic waves reach the surface.

Question 2

What are the three types of seismic waves?

Answer 2

1. P waves
2. S waves
3. Surface waves

Question 3

Describe P waves

Answer 3

P waves are the primary seismic waves, and are the first to arrive. They shake the ground from side to side.

Question 4

Describe S waves

Answer 4

S waves are the secondary seismic waves, and arrive second. They shake the ground both side to side and up and down. S waves can’t move through liquids.

Question 5

Describe surface waves

Answer 5

Surface waves are what some P and S waves become when they reach the surface. They move slower than P and S waves, but can be more destructive. Surface waves make the ground roll in a wavelike motion.

Question 6

What are seismic waves?

Answer 6

Seismic waves are energy waves that come from the center, or focus of an earthquake.