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How a seismograph is used?

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9y ago

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A seismograph is located under the ground. When there is an earthquake, the ground shakes, which also shakes the pen on the seismograph, making it move along the paper, drawing lines. To know how strong the earthquake was, scientist can look on the paper. The bigger the lines, the stronger the earthquake was.

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13y ago
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9y ago

A seismograph is used to measure the vibrations that are caused by an earthquake. The instrument is able to detect even small tremors.

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Q: How a seismograph is used?
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