NYC is on solid bedrock i would think the citys only worry might be the return of the glacier which went back to Canada only 10 or 12 thousand years ago to get and bring back more rocks..
I agree.
My understanding is that much of NYC is sitting on bedrock and those places it isn't, at least for large buildings, they pounded pilings through the fill and overburden into the bedrock. Smaller buildings may have ended up on fill and liquefaction could be a problem for them. But the major buildings are, as I understand it, not going anywhere.
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