<Ul> <Li> Seismometer </Li> <Li> Seismic magnitude scales </Li> <Li> Seismic intensity scales </Li> </Ul> <Li> Seismic magnitude scales </Li> <Li> Seismic intensity scales </Li> <Tr> <Th> Prediction </Th> </Tr>

Tremors that have occurred in earth's crust are known as