Earthquakes and Faults

Question 1

any sudden shaking of the ground

Answer 1

Earthquake

Question 2

where the earthquake begins

Answer 2

Focus / Hypocenter

Question 3

point directly above the focus

Answer 3

Epicenter

Question 4

occur when Earth’s crusts break due to geological forces.

Answer 4

Tectonic earthquakes

Question 5

result from tectonic forces related to volcanic activities.

Answer 5

Volcanic earthquakes

Question 6

caused by seismic waves from rock explosions on the Earth’s surface.

Answer 6

Collapse earthquake

Question 7

occur from the detonation of any nuclear or chemical devices.

Answer 7

Explosion earthquakes

Question 8

a fracture found between two blocks of rock Earth’s crust.

Answer 8

Fault

Question 9

The hanging wall moves down relative to the footwall.

Answer 9

Normal

Question 10

The hanging wall moves up relative to the footwall.

Answer 10

Reverse

Question 11

the motion of the blocks is horizontal or sideways.

Answer 11

Strike-slip

Question 12

move one or more times in the last 10,000 years

Answer 12

Active faults

Question 13

did not move or have been inactive for millions of years.

Answer 13

Inactive faults

Question 14

an estimate of the relative size or strength of an earthquake

Answer 14

Magnitude

Question 15

used to measure the magnitude of an earthquake; developed by Charles Richter

Answer 15

Richter Scale

Question 16

describing the severity of an earthquake.

Answer 16

Intensity

Question 17

seismic wave to measure the intensity of an earthquake.

Answer 17

PEIS (PHILVOCS Earthquake Intensity Scale)

Question 18

travel through the surface of the earth.

Answer 18

Surface waves

Question 19

penetrate through the layers of the earth.

Answer 19

Body waves

Question 20

sea waves generated through underwater earthquakes.

Answer 20

Tsunami