Given that the Richter scale is a base 10- logarithmic measure of the amplitude of an earthquake…(math help)?
Given that the Richter scale is a base 10- logarithmic measure of the amplitude of an earthquake, determine how much stronger an earthquake that measures 6.9 is than one that measures 5.4.
How do you do this?? Explanation and answer please 
6.9 really is 10^(6.9) and 5.4 is 10^(5.4).
Therefore in terms of intensity,
D=10^(6.9)/10^(5.4)=10^(6.9-5.4)=10^(1.5)=31.6
The 6.9 earthquake is 31.6 times stronger than the 5.4 earthquake.
utah earthquake