Discussion
Earthquakes are measured using :
Answer: B
Earthquakes are measured using a seismograph.
A seismograph records the ground motion produced by seismic waves. From these recordings seismologists find the location and depth of an earthquake and its magnitude on scales such as the Richter or moment magnitude scale.
A barometer measures atmospheric pressure, a polygraph records bodily responses in a lie-detector test, and an altimeter measures altitude. None of them measures earthquakes.
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