Earth Science: Geology, the Environment, and the Universe

Section 3: Measuring and Locating Earthquakes

Measuring and Locating an Earthquake

1
How many times larger is a magnitude 3 than a magnitude 1 earthquake on the Richter scale?
A)1/10 times
B)10 times
C)100 000 times
D)100 times
2
What are shallow, intermediate, and deep earthquake classifications based on?
A)amplitude of the largest wave
B)the amount of damage
C)the depth of the focus
D)frequency of the largest wave
3
What is a rating for an earthquake from the modified Mercalli scale based on?
A)its P-wave
B)amplitude of the largest wave
C)frequency of the waves
D)amount of damage
4
What is a rating from the Richter scale based on?
A)damage from the largest wave
B)size of the largest wave
C)wavelength of the waves
D)frequency of the waves
5
According to the map, a seismic station in which city would be the first to detect seismic waves from an earthquake occurring in Mexico City?
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A)Chihuahua
B)Acapulco
C)Houston
D)Boulder
6
Why are three circles needed to determine the epicenter, as shown in the figure?
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A)The more measurements, the better.
B)If only two circles are used, there are two possible locations.
C)Scientists always take measurements in threes.
D)The epicenter can move.
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