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SCEC Education Module: The Richter Scale
This is an online activity in which students learn how to determine Richter magnitudes. The online Richter-magnitude calculator uses frames and layers to allow the user to make determinations of the Richter magnitudes of Southern California earthquakes from seismograms. If your browser supports neither frames nor layers, you will not be able to use this calculator, but there is an alternate page with a printable seismogram and nomograph...
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