An enormous amount of energy is released during an earthquake as seismic waves
which are of
(a) Primary or pressure waves(P-waves)
(b) Secondary or transverse waves(S-waves)
(c) Long waves or surface waves(L-waves)
(d) All of the above
which are of
(a) Primary or pressure waves(P-waves)
(b) Secondary or transverse waves(S-waves)
(c) Long waves or surface waves(L-waves)
(d) All of the above