Statement 1: An earthquake is caused by a disturbance in the inner core of the earth.
Statement 2: Tremors on the surface of earth produce seismic waves which are recorded by seismograph.
The waves generated by the earthquake tremors are called:
(a) ultrasonic waves (b) rhythmic waves (c) systemic waves (d) seismic waves
The instrument which records waves on the surface of the earth produced by tremors is called ___ .
What are the waves produced by tremors on the surface of the earth called? Which instrument is used to record them?