There are various ways of determining magnitude and they all actually indicate different things about an earthquake. The USGS has determined that the
Moment Magnitude method is the most applicable method for the greatest number of earthquakes. It's the best way to compare apples to apples. www.usgs.gov...
While it may seem to some that using this scale "downgrades" earthquake magnitudes, it isn't at all true. In some cases it shows lower magnitudes than
other methods, in some cases it shows greater.
edit on 3/9/2013 by Phage because: (no reason given)
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