Find the magnitude R of an earthquake of intensity $I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }$ . $I = 16000$
A)3.20
B)5.20
C)4.20
D)2.20
E)6.20

Question

Find the magnitude R of an earthquake of intensity $I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }$ .  $I = 16000$ 
A)3.20
B)5.20
C)4.20
D)2.20
E)6.20

Quizplus · Accepted Answer

The magnitude $R$ of an earthquake is given by the formula $R = \log \left( \frac{I}{I_0} \right)$, where $I$ is the intensity of the earthquake and $I_0$ is the reference intensity level. Given $I = 16000$ and $I_0 = 1$, we have $R = \log(16000) = \log(10^4.2) = 4.2$.

Find the Magnitude R of an Earthquake of Intensity I( let I0=1 ) I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }I( let I0​=1 )

Find the Magnitude R of an Earthquake of Intensity $I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }$