Question

Which phrase defines a seismograph?(1 point)
Responses

a wave that is generated by an earthquake
a wave that is generated by an earthquake

a fracture within rocks along which earthquakes occur
a fracture within rocks along which earthquakes occur

an instrument used to measure vibrations
an instrument used to measure vibrations

a record of seismic activity from earthquakes

Answer 1

The phrase that defines a seismograph is:

**an instrument used to measure vibrations**.