Answer:
R = 6.8
Explanation:
Given data:
Richter scale[tex] R = log(\frac{I}{I_o})[/tex]
where R - magnitude of earthquake of Richter scale
I - quake's intensity [tex]= 10^{6.8} \times I_o[/tex]
[tex]I_o[/tex] - minimum intensity earthquake
Plugging all information in the equation to get Richter's scale
[tex]R = log(\frac{10^{6.8} \times I_o}{I_o})[/tex]
[tex]R = log(10^{6.8})[/tex]
R = 6.8