Actually, the New York Post wrote an article about this a few weeks ago, and it's due to the weight of its skyscrapers: https://nypost.com/2023/05/17/nyc-is-sinking-under-the-weight-of-its-buildings-geologists/amp/
New York City is sinking due to the weights of its skyscrapers, according to a study published in the journal Earth's Future.
The study compared satellite data to the geology beneath Manhattan and it showed that the city is collapsing into the earth.
NYC is sinking at a rate of 1-2 millimeters per year due to the weight of it's highrise buildings.
Although this may not seem like an alarming rate, some parts of the city are subsiding significantly faster than others.
This is on par with the fastest understood rates at which tectonic plates rebound when glaciers melt.
The cumulative mass of more than 1 million buildings in NYC works out to be 1.68 trillion pounds.
This only includes the mass of the buildings and their contents, not roads, sidewalks or railways.
“New York faces significant challenges from flood hazard; the threat of sea level rise is 3 to 4 times higher than the global average along the Atlantic coast of North America … A deeply concentrated population of 8.4 million people faces varying degrees of hazard from inundation in New York City,” he and his team wrote in the new report.
