Foreshocks are often recorded in which phase?

Which of the following need not be avoided for construction of quake resistant buildings?

Which waves have helped geologists understand the nature of the earth’s core?

The study of earthquakes is called ______

Stronger and resistant walls should be designed with plain concrete.

The elastic waves generated at the focus are seismic waves.

The inner regions of plates are free from tectonic earthquakes.

How many types on the basis of depth of focus are present?