Saturday, March 7, 2015

Oklahoma earthquake - M3.7 mid-depth thrust

I don't go by anything the discounters say, but I just look at the felt area.  Shear earthquakes always show a narrow band, and shallow thrusts have a small felt area.  This is a nice mid-depth thrust, which gives an intensity 5.  OK is enjoying a little earthquake holiday now because of the Big Freeze.

Update:  Followed by an M3.5 right on my thrust fault.  It's been so long that I thought this thing was dead.  Anyway, one of the highest Intensity to magnitude ratios.  If they actually put in strong ground motion, it would be the highest PGV to M ratio.

Obviously, we have a very shallow thrust fault here.

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