On the Richter scale M = log AA0. An earthquake of magnitude 7 has an amplitude how many times that of a magnitude-5 earthquake?

  1. 1.4 times
  2. 20 times
  3. 2 times
  4. 100 times
Answer

D) 100 times

A difference of 2 in magnitude means log A1A2 = 2, i.e. 10^2 = 100 times. SLO M-09-A-08 · Application

Mathematics MCQ · More Real Numbers MCQs · Practise