Explain the working of seismograph.
**A.**The seismograph consists of a vibrating rod which starts vibrating when tremors occur. A pen is attached to the vibrating rod that records the seismic waves on a paper which moves under it.
Explain the working of seismograph.
**A.**The seismograph consists of a vibrating rod which starts vibrating when tremors occur. A pen is attached to the vibrating rod that records the seismic waves on a paper which moves under it.