Podcast
Questions and Answers
What is the primary cause of ground shaking during an earthquake?
What is the primary cause of ground shaking during an earthquake?
Which type of structures are more prone to earthquake hazards?
Which type of structures are more prone to earthquake hazards?
What is the term for the breaking of the ground along a fault line during an earthquake?
What is the term for the breaking of the ground along a fault line during an earthquake?
What is a factor that influences the intensity of ground shaking during an earthquake?
What is a factor that influences the intensity of ground shaking during an earthquake?
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What is the area on the surface of the Earth where the origin of the earthquake is located?
What is the area on the surface of the Earth where the origin of the earthquake is located?
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What is a type of seismic hazard that occurs when loose soil behaves like a liquid during an earthquake?
What is a type of seismic hazard that occurs when loose soil behaves like a liquid during an earthquake?
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What is the primary cause of landslides during or after an earthquake?
What is the primary cause of landslides during or after an earthquake?
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What is a potential effect of giant waves crashing on structures offshore?
What is a potential effect of giant waves crashing on structures offshore?
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What is a human activity that can contribute to weakening the land and increasing landslide risk?
What is a human activity that can contribute to weakening the land and increasing landslide risk?
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What is a type of seismic hazard that can cause the ground to fail and lose strength?
What is a type of seismic hazard that can cause the ground to fail and lose strength?
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What is a structural vulnerability that can increase the risk of damage during an earthquake?
What is a structural vulnerability that can increase the risk of damage during an earthquake?
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What can occur when loose sandy soil rises to the surface during an earthquake?
What can occur when loose sandy soil rises to the surface during an earthquake?
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What is a major challenge in detecting liquefaction hazards?
What is a major challenge in detecting liquefaction hazards?
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What is the result of ground subsidence during an earthquake?
What is the result of ground subsidence during an earthquake?
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What is the primary cause of a tsunami?
What is the primary cause of a tsunami?
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What determines the height and strength of a tsunami wave?
What determines the height and strength of a tsunami wave?
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What is the term for the movement of the ground during an earthquake?
What is the term for the movement of the ground during an earthquake?
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Study Notes
Earthquake Hazards
- Giant waves can reach up to a kilometer offshore, capable of crashing and swallowing structures along the way.
Ground Shaking
- Caused by the passage of seismic waves through different layers of Earth
- Intensity depends on:
- Geologic makeup of the ground (solid bedrock is less subject to intense shaking than loose soil)
- Duration and intensity of the earthquake
- Proximity of the area to the epicenter
Ground Rupture
- Occurs when ground movement happens on a fault line and breaks through to the surface
- Can happen instantly during an earthquake
- Loose sandy soil can rise to the surface, breaking apart weak structures on top
Subsidence
- Lowering of land due to various causes, including earthquake on a fault line
- Movement of ground during an earthquake can be horizontal, vertical, or both
- Lowering of land becomes permanent, making the general elevation of the land uneven
Tsunami
- A series of waves generated by a sudden displacement on the ocean floor caused by:
- Large-scale undersea landslide
- Earthquake
- Submarine volcanic eruption
- Large meteor crash at sea
- Height and strength of the waves depend on the duration and intensity of ground movement under the water
- Giant waves can exceed 500 miles per hour
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Description
Test your knowledge on earthquake hazards, including ground shaking, natural signs of an impending earthquake, and safety measures to take during an earthquake. Learn to identify potential hazards and interpret hazard maps.
