Friday, April 5, 2013

Mexico earthquake M5.4 - a little spice

They've been getting a few now.  This coast usually spits out M8's, with the capability for a doozy M9.  The last big Mexico City earthquake was around here.  That basin is deep soft soil inside a soft rock basin.  It is capable of amplifying PGV by a 100 times.  Of course, it doesn't amplify PGA, so nobody cares.  :(   It's just one of those many cities with zero seismic capacity, with the same odds for a big earthquake.  Most likely the next big earthquake won't be here.

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