Which statements concerning how geologists locate an earthquake’s epicenter are accurate? Check all that apply.Geologists use seismic waves to locate the center of an earthquake.The epicenter of an earthquake is located at the same place as the seismograph.Geologists use data from two data stations to determine the location of an earthquake.Geologists use data from three or more data stations to determine the location of the epicenter.A seismograph measures the difference between the arrivals of P waves and S waves.
Answer
A
Geologists use seismic waves to locate the center of an earthquake.
B
The epicenter of an earthquake is located at the same place as the seismograph.
C
Geologists use data from two data stations to determine the location of an earthquake.
D
Geologists use data from three or more data stations to determine the location of the epicenter.
E
A seismograph measures the difference between the arrivals of P waves and S waves.
Explanation
Seismic waves travel outward from an earthquake, and geologists use their recorded arrival times to estimate how far away the earthquake occurred. A seismograph records the waves; comparing the arrival times of P waves and S waves gives the time difference used to estimate that distance. Data from three or more stations lets geologists compare distance estimates and pinpoint the epicenter; two stations alone can leave two possible locations.
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