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November 5, 2011
Oklahoma earthquake – not as uncommon as you think
Update 11/6/2011 16:20 UTC: I’ve added a summary explanation of the Wilzetta fault, distilled from the Shale Shaker article listed below, since this appears to be people’s primary interest. Read on for the whole description. Last night Oklahoma’s fairly active seismic zone unleashed a magnitude 4.7 earthquake shortly after 2am. The quake struck about halfway between Oklahoma City and Tulsa. People felt it in places as far north as Wichita, Kansas, and …