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Last month, another struck with a 4.0 intensity in the Jones area.
Over 500 million years ago, the central part of the United States began to separate, but never fully did. This left a rift zone across Oklahoma. A short time later (in geologic time), volcanic eruptions occurred in Oklahoma, and then the continent began to come back together. What resulted were a few areas of 'mountains' - the Wichitas, Arbuckles, and Ouachitas.
Most of the tremors occur in Southern Oklahoma where the mountains are located.
However, these recent quakes seem to be the result of a new fault line that geologists suspect has developed through central Oklahoma.
The geology center near Bixby in the Tulsa area has been keeping a close eye on these as well as quakes around the world. This brief video explains the new fault line in Oklahoma.
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