Sagot :
Answer:
9. d. seismograph
Earthquake detection. A seismogram is a record of the ground motions caused by seismic waves from an earthquake. A seismograph or seismometer is the measuring instrument that creates the seismogram. ... Seismologists study earthquakes and can use this data to determine where and how big a particular earthquake is.
Explanation:
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https://brainly.ph/question/24883673