60. Match the Earthquake related terms in Group I with their definitions in Group II.
Group I Group II
P. Focus 1. The geographical point on the earth’ surface
Q. Epicentre vertically above the originating source
R. Centre of Mass 2. The originating source of the seismic waves inside
S. Centre of Stiffness the earth
3. The point corresponding to the centre of gravity of a
structural system
4. The point through which the resultant of the
restoring forces of a structural system act
The correct answer is P-2,Q-1,R-3, 5-4.