EARTH SCIENCE
EARTHQUAKES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They only analyze local data.
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They collect data from seismographs.
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They measure arrival times of surface waves.
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They draw squares on maps for measurements.
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Detailed explanation-1: -Geologists use seismic waves to locate the center of an earthquake.
Detailed explanation-2: -Geologists use seismic waves to locate an earthquake’s epicenter, measuring the difference between the arrival times of the P waves and S waves.
Detailed explanation-3: -Geologists use seismic waves to locate an earthquake’s epicenter. > they measure the difference between the arrival times of the P waves and S waves. The farther away an earthquake is, the greater the time between the arrival of the P waves and the S waves.
Detailed explanation-4: -A seismometer is an instrument that records the shaking of the Earth’s surface caused by seismic waves. The term seismograph usually refers to the combined seismometer and recording device.
Detailed explanation-5: -How does a Seismograph record earthquake data? As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion.