Richter magnitude scale
The Richter magnitude test scale (or more correctly local magnitude ML scale) assigns a single number to quantify the size of an earthquake. It is a base-10 logarithmic scale obtained by calculating the logarithm of the combined horizontal amplitude of the largest displacement from zero on a seismogram. So, for example, an earthquake of magnitude 5 is ten times greater than one of magnitude 4 and an earthquake of magnitude 8 is 10(8-4) or 10000 times greater than one of magnitude 4.
External links
- USGS: magnitude and intensity
- What is Richter Magnitude?, with mathematic equations
~ Table of Content ~
| ► | Introduction |
| ► | History |
| ► | Problems with the Richter scale |
| ► | Richter magnitudes |
| ► | See also |
| ► | External links |
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