Question

Earthquake at two places A and B were measured by a seismograph which recorded the magnitude as 4 and 6. The magnitude of tremors and its destructive energy at A and B can be compared as under:

• A. Tremor at B is 2 times to that at place A
• B. Tremor at B is 4 times to that at place A
• C. Tremor at B is 100 times to that at place A
• D. Tremor at B is 1000 times to that at place A

Answer 1

Answer: (C)

Tremor at B is 100 times to that at place A

Richter scale is not a linear scale. It is a logarithmic scale. A difference in magnitude of $2$ implies a multiplication factor of ${10}^2=100$.