9. How do scientists find out the intensity and duration of Earthquakes?*1 pointSeismic wavesSeismographSeismogramSeismos
Question
9. How do scientists find out the intensity and duration of Earthquakes?*1 pointSeismic wavesSeismographSeismogramSeismos
Solution
Scientists find out the intensity and duration of earthquakes using a seismograph. Here's the step-by-step process:
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An earthquake occurs and sends out seismic waves in all directions.
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These seismic waves reach the seismograph. The seismograph is a device that has a base fixed to the ground and a free hanging weight with a pen attached to it. When the ground shakes, the base of the seismograph shakes with it, but the hanging weight does not move due to inertia.
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As a result, the pen attached to the hanging weight records a trace on a paper that is fixed to the base of the seismograph. This trace is a record of the ground motion at the seismograph's location and is called a seismogram.
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Scientists then analyze the seism
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