Use the Following to Answer Questions :
the Magnitude of an Earthquake

question 45

Multiple Choice

Use the following to answer questions :
The magnitude of an earthquake is given by the equation where I is the actual intensity of the earthquake and I₀ is the reference intensity (the smallest earth movement that can be recorded on a seismograph) .
-Find the value of M(I) when I = 81,500I₀. Round your answer to the nearest tenth.

• A) \(\approx\) 4.6
• B) \(\approx\) 4.7
• C) \(\approx\) 4.8
• D) \(\approx\) 4.9