Friday, November 7, 2014

Nevada Earthquake Sequence - Natural Fluid Injection

My inbox has been flooded with these earthquakes.  I had set my trigger to M4.0 in the US, just to catch the next OK significant earthquake, but it's all this Nevada crap.

That's a 10 km square.  Apparently these things are quite common in the region, always topping in a few weeks with some M5's.  The dimensions limit the magnitude.  I've come to the conclusion that such swarms are always the result of water bursting through a barrier.  The small size is an indicator.  As well, if they had decent seismometer coverage, and looked carefully, they would find identical couplets which are characteristic of fluid flow.  I doubt the coverage is any good here.

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