In case of earthquakes, an increase of magnitude 1 on Richter Scale implies

40. In case of earthquakes, an increase ofmagnitude 1 on Richter Scale implies
(A) a ten-fold increase in the
amplitude of seismic waves.
  (B)  a ten-fold increase in the energy
of the seismic waves.
  (C)  two-fold increase in the amplitude
of seismic waves.
  (D)  two-fold increase in the energy of
seismic waves.

Ans: A