Friday, October 26, 2012

Bizarre earthquake felt in Toronto

M2.5.  I am calling this bizarre, since we get this size of earthquake all the time around here.  So, why did I see it on the wall tv, while I was eating my fish and chips in Hamilton?  It's because this seemed to put a hefty PGV (peak ground velocity) for its magnitude.  Perhaps we should call it a Canadian M3.  :)

I like this location because it was at one of my obsessions early in my career - the Clarendon-Lindon fault system.  This was treated as something grand for a long time, until we found out it was the surface disturbance of a deeper Precambrian megathrust.  But, at the time, it was a star, and the whole Darlington seismic design was hinged on it.

Anyway, as usual, if you felt this earthquake in Toronto, you are in real doo-doo should we have a 'real' earthquake, because your soil is amplifying by more than 10 times.  Have fun!

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