Exponential and Logarithmic Models

Question

One earthquake has MMS magnitude 3.3. If a second earthquake has 340 times as much energy (earth movement) as the first, find the magnitude of the second quake.

Answer 1

I think what is wanted is M=log₁₀((340)*(Intesity 1st quake))=log₁₀340 +log₁₀(intensity 1st quake)

the second term is given 3.3 the first term is 2.53

M=5.83