## burhan101 Group Title Log one year ago one year ago

1. burhan101

Formula is $\huge M=\log \frac{ I }{ I _{0} }$

2. satellite73

richter scale is log base 10 so compute $\frac{10^{8.3}}{10^{7.6}}=10^{8.3-7.6}=10^.7$ then use a calculator

3. burhan101

for number 6. which formula form the ones listed do i need @satellite73

4. satellite73

i am not sure what you are asking it is really just a matter of subtracting, then taking ten to that power

5. burhan101

So no formulas are involved ? like i'm talking about the formulas at the top of the page