The place where an earthquake originates is called _______.
The size of an earthquake is expressed in terms of magnitude on a scale called ___.
The intensity of an earthquake is expressed in terms of magnitude on a scale called:
The place inside the earth's crust where the erthquake is generated is called:
(a) seismic zone of the earth (b) epicentre of the earthquake
(c) fault zone of the earth (d) focus of the earthquake
The device used to measure the seismic waves caused during an earthquake is called a/an _______.
Earthquakes have a point of origin called the ____.