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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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Base Isolation as useless as I always said it was

Reference I remember when base isolation was a big thing.  I said "Blah, you don't know the physics.', or something like that.  BI was another corruption from 'Shake Table Garbage'.  At that time, the path to engineering glory was to build a bigger shake table, perhaps it still is. Base isolation and crapping around with shake tables only ever gave you a factor of two, in terms of PGV.  

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