Find the intensity I of an earthquake measuring R on the Richter scale (let I0 = 1).

Question:

Find the intensity I of an earthquake measuring R on the
Richter scale (let I0 = 1).
(a) Peru in 2015: R = 7.6
(b) Pakistan in 2015: R = 5.6
(c) Indonesia in 2015: R = 6.6
Use the Richter scale
R = log I/I0
for measuring the magnitude R of an earthquake.