Tuesday, November 11, 2014

Seasonal Summary of Earthquakes in Southern Ontario

This is from the Southern Ontario Seismic Network (SOSN) that I helped out with at one time.  It's probably the best seismic network east of California.  Combined with all the deep seismic reflection data, it has helped formulate my ideas of what is happening here and in the States.

Note the very tight association with water.  Basically, no water, no earthquakes, with some exceptions.  The stuff around Buffalo and Windsor is a result of heavy salt injections.  The instability of Georgian Bay has only come out recently with new seismometers.  It defines the geology for the Bruce Black Hole, but that's another story.  :)

We've got our deep Precambrian mountain roots, formed from the accretion of island arcs.  This has given us the banding of megathrusts that go right down to Texas.  All the oil companies down there have imaged these things, but like the Bruce Hearings Panel, they have chosen to ostrichify.  :)

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