Posted by **Lena** on Tuesday, September 28, 2010 at 12:45am.

What determines the magnitude of an earthquake? I know that two plates slide against one another and that creates friction and the potential energy turns into kinetic energy in the form of an earthquake. But how is the magnitude determined? Im thinking the longing the 2 plates are locked, the more potential energy is created = larger earthquake. Not 100% sure. Thanks in advance! :)

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