Question 1 A measure of earthquake size based on the amount of energy released d

Question

Question 1

A measure of earthquake size based on the amount of energy released during the earthquake.

intensity

focus

magnitude

epicenter

1 points   

Question 2

The point of initial breaking or rupturing within the Earth.

scarp

epicenter

focus

subticenter

magnitude

1 points   

Question 3

Which of the following is not included in determining the moment magnitude of an earthquake?

the rigidity of the rocks along the fault

how intense the shaking felt to people near the epicenter

an estimate of the area along the fault that ruptured

the amount of movement along the fault

1 points   

Question 4

What is the name of the earthquake magnitude scale that is used today by seismologists?

Seismograph Scale

Moment Magnitude Scale

Richter Scale

Modified Mercalli Scale

1 points   

Question 5

A magnitude 7 earthquake produces approximately _____ times more ground motion (shaking) than a magnitude 6 earthquake.

2

100

10

32

1 points   

Question 6

A magnitude 7 earthquake releases ______ times more energy than a magnitude 6 earthquake.

10

100

2

32

7

1 points   

Question 7

The Modified Mercalli Scale measures all of the following except __________.

the amount of damage that occurred within homes

the amount of movement along a fault plane

the extent of damage to buildings and human-made structures

how people perceived the shaking

1 points   

Question 8

Which of the following statements regarding the 2001 Nisqually earthquake in Washington and the 1994 Northridge earthquake in California is TRUE?

They had approximately the same magnitude and the same intensity

They had approximately the same magnitude but different intensity

They had approximately the same intensity but different magnitude

1 points   

Question 9

If the motion on a geologic fault is such that the hanging wall moves down relative to the foot wall, then the fault is called a ___________.

Transform fault

Footwall fault

Normal fault

Reverse fault

Strike-slip fault

1 points   

Question 10

Scientists classify a particular fault to be an active fault if it has moved during the past __________ years.

2 million

20

10,000

100

1 points   

Question 11

Which seismic waves travel the fastest?

Surface waves

P waves

Love waves

Rayleigh waves

S waves

1 points   

Question 12

The written record of seismic waves is called a _____________.

Seismogram

Seismograph

Seismoline

Seismoplot

1 points   

Question 13

Which of the following near-surface earth materials will amplify ground shaking the most? (This material will greatly increase the intensity of shaking.)

Water-saturated silt and mud

alluvium

hard igneous rocks

sedimentary rocks

1 points   

Question 14

Which of the following statements regarding strain is MOST accurate?

strain is deformation that results from stress

strain and stress are two words that mean the same thing

stress is deformation that results from strain

stress and strain are both caused by elastic rebound

1 points   

Question 15

Which of the following statements about earthquakes is NOT true?

strong earthquakes can occur in locations far from plate boundaries (i.e. Missouri, South Carolina)

earthquake are not randomly distributed

earthquakes occur along all three types of plate boundaries: convergent, divergent, and transform

most of the worlds largest earthquakes (> M 9) occur along transform plate boundaries

a.

intensity

b.

focus

c.

magnitude

d.

epicenter

Explanation / Answer

1) c. magnitude

Modern seismographic systems precisely amplify and record ground motion (typically at periods of between 0.1 and 100 seconds) as a function of time. This amplification and recording as a function of time is the source of instrumental amplitude and arrival-time data on near and distant earthquakes

2) epicenter

4) a. Seismograph Scale

A seismic scale is used to calculate and compare the severity of earthquakes.

Two fundamentally different but equally important types of scales are commonly used by seismologists to describe earthquakes. The original force or energy of an earthquake is measured on a magnitude scale, while the intensity of shaking occurring at any given point on the Earth's surface is measured on an intensity scale.

5) c. 10

107 / 106 = 10 times

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