Tuesday, July 21, 2026

Earthquakes - minimum ground motion to cause damage

 


This is our worst scenario for buildings - unmortared piles of stone.  Over the years, I have settled on 2 cm/s for this type of damage.  People run out of office towers at 2 mm/s.  Note that the floppy building in the background is still standing.  I always look in the background of these pictures.

Obviously, they should follow Guatemala by using concrete and steel.  Also the extremely heavy roofs of Peru are a factor.  


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