What does a seismograph record?
a.
the Mercalli scale rating for an earthquake
b.
the speed of seismic waves
c.
the ground movements caused by seismic waves
d.
the location of the epicenter

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C, The ground movements (vibrations) caused by seismic waves. Example: Earthquakes. Hope this helped!
The answer is C. The ground movements caused by seismic waves.  Hope this helps.