Question 47886
Why is a 7.0 earthquake ten times stronger than a 6.0 earthquake?

The 1st earthquake has magnitude 10^7 I(o) where I(o) is the smallest
magnitude earthquake detectable by the Richter Scale.

The 2nd earthquake has magnitude 10^6 I(o) on the Richter Scale.

Note that one earthquake is ten time more powerful than the other.

Chers,
Stan H.