Faults
Siesmic Waves
Damage
Magnitude
Creates
100
Normal Faults
Along the Mid-Atlantic Ridge, two tectonic plates are moving away from each other. In this area, earthquakes likely occur along?
100
Primary waves
When an earthquake occurs, the first seismic waves to reach a nearby city are?
100
Along tectonic plate boundaries.
Most earthquakes occur at?
100
Distance over which blocks of rock move.
The strength of an earthquake depends in part on the?
100
Tsunami
An earthquake in the ocean floor causes a water wave to form. This wave is an example of a?
200
Pulls rocks apart
Normal faults are the result of stress that?
200
Rocks
Secondary waves can travel through?
200
Cross braces
Which of the following help reduce earthquake damage to tall office buildings?
200
Moment magnitude scale
A scale used to descrive the amount of energy released by an earthquake is the?
200
Aftershocks
What do citizens in an earthquake area have to worry about, specifically, after an earthquake occurs?
300
Is quick and sudden
Earthquakes occur when movement along a fault?
300
Seismograph
The instrument that scientists use to record seismic waves is called a?
300
8.0 or above
Which type of earthquake causes the most damage?
300
The earthquake risk of an area.
What can scientists usually predict about an earthquake area?
300
Surface waves
Which type of seismic wave creates the most damage in an earthquake?
400
Earthquakes
Sudden movements of rock along a fault cause?
400
By the time it takes the first p waves to get there
If there are 3 seismograph stations, how can you tell which one is the farthest away?
400
Depends on how much the rocks move
Which types of earthquakes cause the most damage?
400
Epicenter
The point on Earth's surface directly above where rocks first start to move during an earthquake is the earthquake's?
400
Shear walls
What is one method to improve a building's safety before an earthquake?
500
Slide past each other.
Along a strike slip fault, what happens to the rocks?
500
3.5 minutes
If the p wave arrives at 5:04 minutes, and the s wave arrives at 5:085, what is the difference in arrival times?
500
Cause less damage.
Compared to a shallow focus earthquake, a deep focus earthquake with the same magnitude and epicenter tends to?
500
0-3.9
What is the magnitude of an earthquake that is barely noticable?
500
Liquefaction
Which process occurs as a result of an earthquake and causes landslides?
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