Earthquakes at two places A and B were measured by a seismograph which recorded the magnitude as 2 and 4. The magnitude of tremors and the destructive energy at A and B can be compared as
(a) Tremors at B are two times those at place A
(b) Tremors at B are four times those at place A
(c) Tremors at B are 100 times those at place A
(d) Tremors at B are 1000 times those at place A