Find the intensity of the 2011 Japanese earthquake if its magnitude was 9.0 on the Richter scale.

On the Richter scale, the
magnitude R of an earthquake of intensity I is given by R=log (I/I_{o}), where I_{o}=1 is the minimum intensity used for
comparison.

9.0=log(I/1)

9.0=log(I)

10^{9.0}=I