A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.7 X 10^2 µm. Find this earthquake's magnitude. (Round your answer to one decimal place.)

I never learned how to do this...... HELP PLEASE!

Question

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.7 X 10^2 µm. Find this earthquake's magnitude. (Round your answer to one decimal place.)
 
I never learned how to do this...... HELP PLEASE!

anonymous · Answer

The equation for the magnitude of an earthquake involves logs, right? It's certainly not a part of the standard curriculum of any mathematics courses typically. Do you happen to have a formula to work with? Involving logs perhaps?

anonymous · Answer

|dw:1376072888355:dw|