Earthquakes

Question 1

Epicenter

Answer 1

A point on the Earth’s surface directly above the hypocenter

Question 2

Focus

Answer 2

Where slippage along the fault zone results in an earthquake

Question 3

Surface Wave

Answer 3

Wave that travels across the surface of the Earth

Question 4

Primary Wave (P)

Answer 4

Alternate between compressing and extending. They are fast traveling

Question 5

Secondary Wave (S)

Answer 5

Fluid movement like ocean waves. Up and Down motion

Question 6

Seismic Waves

Answer 6

Elastic Wave

Question 7

Strike-Slip Fault

Answer 7

Fault movement in a horizontal direction.

Question 8

Dip-slip Fault

Answer 8

Caused by a combo of shearing and tension or compression

Question 9

Why are deep-focus earthquakes concentrated in subduction zones?

Answer 9

Earthquakes occur in the lithosphere. So, deep-focus earthquakes are concentrated in subduction zones, where elastic lithosphere is pushed deep into the upper mantle

Question 10

Difference between magnitude and intensity

Answer 10

Magnitude is the ground movement and intensity is the measure of effects on humans ans surface features

Question 11

3 Earthquake hazards

Answer 11

Fire: turn off all gas sources
Tsunamis: Walls
Liquefaction