Wednesday, September 5, 2012

Costa Rica Subduction Earthquake M7.6

This is a classic dipping slab earthquake, depth at 40 km.

You can see the strong subduction zone.  That dips under Costa Rica, and makes for nice volcanoes.

This is a solution for fault motion.  The earthquake rupture zone is quite small for this type of earthquake, and is in a good location to be a foreshock of an M8 or 9.  10% chance in the next 2 days.  The earthquake is reporting some damage zones of Intensity 8 (VIII), so there are certainly some deaths and injuries.

Update:  Looks like a very low PGV, not much damage.

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