Originally posted by Mini D
Strange... Lamont's database doesn't list any earthquakes of any magnitude in NYC after between February 2001 and the end of September 2001.
Huh. I wonder where they got their data.
MiniD
Were the hell did the data go then?
"Shaking the ground
When the crumbling towers thudded to the ground, they created ground tremors equal to earthquakes of magnitude 2.1 and 2.3, as measured by a seismic station in Palisades, New York, 21 miles (34 kilometers) north of Manhattan.
These would be small numbers for earthquakes, not likely to be felt by anyone, since an earthquake is typically centered miles below the surface, its energy radiating out and dissipating over great distances. But the energy from the collapse of the towers was focused in a very small area, making it remarkable that the events were detected at all outside lower Manhattan.
Much of this energy went into destroying the buildings themselves and generating the cloud of debris."
http://www.space.com/scienceastronomy/generalscience/wtc_science_010919.html