[Paul R.]

Another interesting comparison is to a very large building. I found an estimate online of the Willis Tower in Chicago, at 1,798,000 cu. meters. So, call this collapse volume equal to roughly 19 UN-collapsed Willis Towers.

I also found a reference to the World Trade Center at approx. 1,700,000 cu. meters per Tower. So the WTC collapse (both towers, less the adjoining structures) would be almost exactly 1/10 of this mountain. Granted that these structures are obviously (were) not solid.

[Windflier]

...found a reference to the World Trade Center at approx. 1,700,000 cu. meters per Tower. So the WTC collapse (both towers, less the adjoining structures) would be almost exactly 1/10 of this mountain.

Impressive. Damn good thing this mountain didn't come down near a highly populated area.

Geologists the world over must be mesmerized by this story tonight. It's absolutely mind blowing.