Question 1

The Modified Mercalli Intensity Scale measures the

Accepted Answer

A)  magnitude of an earthquake without consideration of ground conditions. 
B)  degree to which an earthquake affects people, property and the ground. 
C)  energy released in a seismic event. 
D)  horizontal and vertical displacement at the epicentre. 
E)  intensity of seismic waves in the Earth's crust. 
A)  magnitude of an earthquake without consideration of ground conditions. 
B)  degree to which an earthquake affects people, property and the ground. 
C)  energy released in a seismic event. 
D)  horizontal and vertical displacement at the epicentre. 
E)  intensity of seismic waves in the Earth's crust.

Question 2

What is a seismic gap?

Accepted Answer

When earthquakes occur on a fault,not al

Question 3

The boundary between the North American Plate and the Juan de Fuca Plate under Vancouver Island is a

Accepted Answer

A)  normal fault. 
B)  strike-slip fault. 
C)  transform fault. 
D)  subduction zone. 
E)  hanging wall. 
A)  normal fault. 
B)  strike-slip fault. 
C)  transform fault. 
D)  subduction zone. 
E)  hanging wall.

Question 4

In the case of a reverse fault,the hanging wall has moved down relative to the footwall.

Accepted Answer

A) True 
 B)False

Question 5

Intraplate earthquakes occur at the boundary between plates.

Accepted Answer

A) True 
 B)False

Question 6

What is earthquake amplification and what causes it?

Accepted Answer

Amplification occurs when seis

Question 7

Describe how earthquakes can cause outbreaks of disease.

Accepted Answer

Earthquakes can disrupt public health se

Question 8

A section of an otherwise active fault zone that has not experienced an earthquake is

Accepted Answer

A)  a normal fault. 
B)  a seismic gap. 
C)  dormant. 
D)  a subduction zone. 
E)  a transform fault. 
A)  a normal fault. 
B)  a seismic gap. 
C)  dormant. 
D)  a subduction zone. 
E)  a transform fault.

Question 9

In 2001,a magnitude 6.8 earthquake occurred in Washington State with no casualties,while a 6.1 magnitude earthquake occurred in El Salvador killing and injuring over 3500 people.What geophysical reasons might explain why the lower magnitude earthquake killed more people?

Accepted Answer

geophysical considerations: focal depth

Question 10

To locate the epicentre of an earthquake,what is the minimum number of seismograms that you need (from different locations)?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 11

Of the seismic waves,P waves

Accepted Answer

A)  travel fastest. 
B)  do the most damage. 
C)  move from side to side. 
D)  do not travel through the core. 
E)  are shear waves. 
A)  travel fastest. 
B)  do the most damage. 
C)  move from side to side. 
D)  do not travel through the core. 
E)  are shear waves.

Question 12

Movement along dip-slip faults is primarily vertical.

Accepted Answer

A) True 
 B)False

Question 13

Approximately how frequently do earthquakes of magnitude 8 or greater occur?

Accepted Answer

A)  once a month 
B)  once a year 
C)  once every 5 years 
D)  once every 10 years 
E)  once every 20 years 
A)  once a month 
B)  once a year 
C)  once every 5 years 
D)  once every 10 years 
E)  once every 20 years

Question 14

Which of the following factors affects the amount of shaking an area experiences during an earthquake?

Accepted Answer

A)  earthquake magnitude 
B)  distance to the focus 
C)  directivity of the rupture 
D)  local rock and coil characteristics 
E)  all of the above 
A)  earthquake magnitude 
B)  distance to the focus 
C)  directivity of the rupture 
D)  local rock and coil characteristics 
E)  all of the above

Question 15

Give at least two ways in which human activities have caused or triggered earthquakes.

Accepted Answer

When dams and water reservoirs are const

Question 16

Horizontal shaking from earthquakes causes more damage than vertical shaking.

Accepted Answer

A) True 
 B)False

Question 17

There is a direct correlation between earthquake magnitude and casualties,such that larger earthquakes always result in more deaths.

Accepted Answer

A) True 
 B)False

Question 18

Sudden earthquakes are unlikely along faults where tectonic creep occurs.

Accepted Answer

A) True 
 B)False

Question 19

When water-saturated loose sediment is shaken during an earthquake

Accepted Answer

A)  it solidifies. 
B)  it loses its cohesion and fails. 
C)  it reduces the amount of seismic energy. 
D)  it absorbs more water. 
E)  it becomes stronger. 
A)  it solidifies. 
B)  it loses its cohesion and fails. 
C)  it reduces the amount of seismic energy. 
D)  it absorbs more water. 
E)  it becomes stronger.

Question 20

An earthquake forecast

Accepted Answer

A)  is a prediction of when and where an earthquake will happen. 
B)  predicts the magnitude of the next earthquake for a particular region. 
C)  outlines the damage to human infrastructure expected in the next earthquake in a particular region. 
D)  states the risk to human populations in earthquake-prone regions based on the geological materials on which most of the buildings are constructed. 
E)  states the probability of an earthquake of particular magnitude occurring in an area within a specified time. 
A)  is a prediction of when and where an earthquake will happen. 
B)  predicts the magnitude of the next earthquake for a particular region. 
C)  outlines the damage to human infrastructure expected in the next earthquake in a particular region. 
D)  states the risk to human populations in earthquake-prone regions based on the geological materials on which most of the buildings are constructed. 
E)  states the probability of an earthquake of particular magnitude occurring in an area within a specified time.

The Modified Mercalli Intensity Scale measures the

What is a seismic gap?

The boundary between the North American Plate and the Juan de Fuca Plate under Vancouver Island is a

In the case of a reverse fault,the hanging wall has moved down relative to the footwall.

Intraplate earthquakes occur at the boundary between plates.

What is earthquake amplification and what causes it?

Describe how earthquakes can cause outbreaks of disease.

A section of an otherwise active fault zone that has not experienced an earthquake is

In 2001,a magnitude 6.8 earthquake occurred in Washington State with no casualties,while a 6.1 magnitude earthquake occurred in El Salvador killing and injuring over 3500 people.What geophysical reasons might explain why the lower magnitude earthquake killed more people?

To locate the epicentre of an earthquake,what is the minimum number of seismograms that you need (from different locations)?

Of the seismic waves,P waves

Movement along dip-slip faults is primarily vertical.

Approximately how frequently do earthquakes of magnitude 8 or greater occur?

Which of the following factors affects the amount of shaking an area experiences during an earthquake?

Give at least two ways in which human activities have caused or triggered earthquakes.

Horizontal shaking from earthquakes causes more damage than vertical shaking.

There is a direct correlation between earthquake magnitude and casualties,such that larger earthquakes always result in more deaths.

Sudden earthquakes are unlikely along faults where tectonic creep occurs.

When water-saturated loose sediment is shaken during an earthquake

An earthquake forecast

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Snow Avalanches

Subsidence and Soil Expansion and Contraction

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Exam 3: Earthquakes

The Modified Mercalli Intensity Scale measures the

What is a seismic gap?

The boundary between the North American Plate and the Juan de Fuca Plate under Vancouver Island is a

In the case of a reverse fault,the hanging wall has moved down relative to the footwall.

Intraplate earthquakes occur at the boundary between plates.

What is earthquake amplification and what causes it?

Describe how earthquakes can cause outbreaks of disease.

A section of an otherwise active fault zone that has not experienced an earthquake is

In 2001,a magnitude 6.8 earthquake occurred in Washington State with no casualties,while a 6.1 magnitude earthquake occurred in El Salvador killing and injuring over 3500 people.What geophysical reasons might explain why the lower magnitude earthquake killed more people?

To locate the epicentre of an earthquake,what is the minimum number of seismograms that you need (from different locations)?

Of the seismic waves,P waves

Movement along dip-slip faults is primarily vertical.

Approximately how frequently do earthquakes of magnitude 8 or greater occur?

Which of the following factors affects the amount of shaking an area experiences during an earthquake?

Give at least two ways in which human activities have caused or triggered earthquakes.

Horizontal shaking from earthquakes causes more damage than vertical shaking.

There is a direct correlation between earthquake magnitude and casualties,such that larger earthquakes always result in more deaths.

Sudden earthquakes are unlikely along faults where tectonic creep occurs.

When water-saturated loose sediment is shaken during an earthquake

An earthquake forecast

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Snow Avalanches

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters