The magnitude of an earthquake (amount of energy released)

Last updated: 7/11/2022

The magnitude of an earthquake (amount of energy released) is described by the formula R = log(I/I0), where I is the intensity of the earthquake and lo is the minimum measurable intensity. If one earthquake had a magnitude of 7.4 and another one measured 8.1, how many times more intense was the second earthquake than the first? The second earthquake was about times more intense than the first. (Round to the nearest tenth as needed.)