Question

The depth of the focus from the epicentre is known as __________

(a) Shock depth

(b) Epicentre depth

(c) Focal depth

(d) Earthquake depth

I have been asked this question in homework.

My query is from Earthquake Terminology and Seismic Effects on Buildings in section Earthquake Resistant Buildings of Construction & Building Materials

Answer 1

Correct choice is (c) Focal depth

For explanation I would say: The point which is vertically above the focus on the surface of the earth is called the epicentre. The depth of the focus from the epicentre is known as focal depth. It is an essential parameter to determine the damaging potential of an earthquake.