This preview shows page 1. Sign up to view the full content.
Unformatted text preview: There are many
different ways of computing this based on a variety of different quantities. We are going to take a
quick look at the formula that uses the energy released during an earthquake.
If E is the energy released, measured in joules, during an earthquake then the magnitude of the
earthquake is given by, æEö
M = log ç ÷
è E0 ø
where E0 = 104.4 joules. Example 5 If 8 ´ 1014 joules of energy is released during an earthquake what was the
magnitude of the earthquake?
There really isn’t much to do here other than to plug into the formula. æ 8 ´ 1014 ö 2
M = log ç
= log ( 8 ´ 109.6 ) = (10.50308999 ) = 7.002
So, it looks like we’ll have a magnitude of about 7. © 2007 Paul Dawkins 313 http://tutorial.math.lamar.edu/terms.aspx College Algebra Example 6 How much energy will be released in an earthquake with a magnitude of 5.9?
In this case we will need to solve the following equation. 2
5.9 = log ç 4.4 ÷
è 10 ø
We saw how...
View Full Document
This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.
- Spring '12