Asked by justin
Which statement describes a seismograph?
It has a flat graphing surface.
It is used to locate an earthquake’s focus.
It uses a needle on graph paper to measure seismic wave activity.
It measures data used to find the difference between the arrival times of surface waves.
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Answered by
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It uses a needle on graph paper to measure seismic wave activity.
A seismograph records ground motion (traditionally with a suspended mass and pen/needle that traces waves on paper; modern instruments record digitally).
A seismograph records ground motion (traditionally with a suspended mass and pen/needle that traces waves on paper; modern instruments record digitally).
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