Question

Select the correct answerThe Richter scale measures the magnitude of an earthquake as a function of its intensity, and the intensity of a reference earthquake To.log(aN = logWhich equation calculates the magnitude of an earthquake with an intensity 10,000 times that of the reference earthquake?OAOB N == lo8(1970)log(10,000)log(10,000)108(in, doo)OCM =ODM=

Answer 1

The equation for the magnitude of earthquake as function of intensity I and reference intensity I_0 is,

$M=\log (\frac{I}{I_0})$

Earthequake intensity is 10,000 times the refernce earthquake. So,

$I=10,000I_0$

Substitute the values in the equation to obtain equation for measure of eqathquake intensity.

$\begin{gathered} M=\log (\frac{10,000I_0}{I_0}) \\ =\log (10,000) \end{gathered}$

Answer: Option B