Question

If an earthquake is 121,000 times as intense as the minimum detectable earthquake, what is its Richter number?
Round answer to the nearest tenth. Thank you!

Answer 1

Do you happen to know the equation for richter numbers?

Answer 2

R=log(I/Io) ?

Answer 3

That looks right.

\[\log_{10}(\frac{121000}{1}) \]

Answer 4

So basically you are looking for what power of 10 equals 121000. That is also the Richter number.

Answer 5

5.08?

Answer 6

That's what I got.

Answer 7

Thanks so much!