Answer:
Step-by-step explanation:
Seismograph is an instrument that measures and records details of earthquakes
How does it work???
The instrument is simply a vibrating rod, or a pendulum, which
starts vibrating when tremors occur. A pen is attached to the vibrating system.
The pen records the seismic waves on a paper which moves under it. By studying
these waves, scientists can construct a complete map of the earthquake