Richter scale question

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An earthquake registers 6.1 on the richter scale. What is the rating on an earthquake twice as powerful?

I know: M=I/Io

Then what do you do?

• Richter scale question -

http://www.matter.org.uk/schools/content/seismology/richterscale.html

Is the epicenter in the desert? In the mountains? In a city? Is it a strike-slip, normal, or thrust type of earthquake?
http://earthquake.usgs.gov/learn/glossary/?term=strike-slip

Lots of different factors.

• Richter scale question -

I was not given any information regarding these factors, I wrote out the question I was given

• Richter scale question -

Be sure you read (and reread and reread, if necessary) the first paragraph in that first link I gave you above.

Read carefully and apply...

• Richter scale question -

I'm sorry, I'm still confused.

Is it something like log(2) 6.1??

• Richter scale question -

Add log 2 to 6.1

• math -

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.9 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

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