Which of the following represents the most powerful earthquake?

a. Kuril Islands, 8.5

b. Great Chilean, 9.5

c. San Francisco, 7.8

d. Prince William Sound, 9.2

the one that represent the most powerful earthquake is : B. Great chilean, 9.5 the number behind the event indicate the level of Richter Scale. Richter scale is an indicator used to measure the strength of an earthquake by calculating the ration of amplitude of the seismic waves. In richter scale, the earthquakes are measured between 0 (weakest) to 10 (strongest)