Wednesday, May 22, 2013

Arkansas injection earthquakes

These are tightly clustered around two injection wells.  For a while, I had thought the lake had something to do with it.  There appears to be no mechanism associated with these, so it probably isn't close to a megathrust, unlike the first Arkansas sequence.  Nevertheless, they are injecting into the Precambrian, so things can happen.  Personally, I would just let these things go, and try to get more scientific information, such as time histories of flow and pressure.

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