Name the instrument that records the surface waves of the earth caused due to tremors.
Name two events (other than earthquakes) which can cause tremors on the earth.
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?
____________ occur when the surface of the Earth shakes due to tremors on the Earth.