Post by 8real on Sept 16, 2006 13:54:07 GMT -5
Evidence of an Explosion at the Base of WTC Towers:
Seismographs at Columbia University's Lamont-Doherty Earth Observatory in Palisades, New York, 21 miles north of the WTC, recorded strange seismic activity on September 11 that has still not been explained.
The Palisades seismic record shows that — as the collapses began — a huge seismic "spike" marked the moment the greatest energy went into the ground. The strongest jolts were all registered at the beginning of the collapses, well before the falling debris struck the earth. These unexplained "spikes" in the seismic data lend credence to the theory that massive explosions at the base of the towers caused the collapses.
source: news.bbc.co.uk/2/hi/science/nature/1554560.stm (BBC News-Collapsing towers caused seismic shock)
The Table below translates the above graph.
Source: www.firehouse.com/tech/news/2002/0121_terrorist.html (Firehouse.com Technology and the Terrorist Attacks: Part 3)
Lieutenant Bradley Mann, E.M.S. - "Shortly before the first tower came down, I remember feeling the ground shaking. I heard a terrible noise, and then debris just started flying everywhere. ... By the time the debris settled from the first collapse, we started to walk back east, toward West Street, and a few minutes later ... we basically had the same thing: The ground shook again, and we heard another terrible noise and the next thing we knew the second tower was coming down."
Jody Bell, E.M.T. - I lost track of time. You start to hear this rumble. You hear this rumble. Everything is shaking. Now I'm like, what the hell could that be. I'm thinking we're going to get bombed. This is an air raid. You hear this thunder, this rumbling. Then you see the building start to come down. Everybody's like, "Run for your lives! The building is coming down!"
Lonnie Penn, E.M.T. - "We felt the ground shake. You could see the towers sway and then it just came down and I never looked back once I started running."
Paul Curran, Firefighter F.D.N.Y. - "...all of a sudden the ground just started shaking. It felt like a train was running under my feet. ... The next thing we know, we look up and the tower is collapsing."
Louis Cook, E.M.T. - "I made it up onto the -- I guess you call it the concourse level, the mezzanine level, and onto the foot bridge when I started to hear -- I thought I heard an explosion of some sort, but I kind of dismissed it. I figured, ah, it's just something burning upstairs. I really didn't think of what was going on. Okay. I start going across this pedestrian bridge. I'm the only one on this bridge. I'm walking across it, and then I just remember feeling a rumble and hearing this rumbling sound that was really intense. It actually shook my bones."
source for the above 5 quotes: graphics8.nytimes.com/packages/html/nyregion/20050812_WTC_GRAPHIC/met_WTC_histories_full_01.html (Sept. 11 Oral Histories)
Stephen Evans, North America Business Corrospondent"...then somebody said that they saw an airliner go into one of those towers. Then, an hour later than that we had that big explosion from much, much lower down and I don't know what caused that."
source: www.youtube.com/watch?v=JW_jm3EEHLQ (Explosions heard a hour later...From below the WTC?)
This next video is a unique piece of footage showing the collapse of WTC 1 and it corroborates the above. The camera was not hand held, it was directly connected to the ground via a tripod, and this allowed the camera to visually capture a ground shake which occurred ~13 seconds before the building collapsed. The video also shows an object fall from the right hand side of the building moments before the camera begins to shake. The close timing of these two events indicates they are linked. Some skeptics believe that the camera as "kicked" or "jostled". I call these people "coincidence theorist", because they have to believe the camera was kicked, and then coincidently, a piece of the WTC debris fell off.
www.youtube.com/watch?v=UrPpkuw8qro (Video of WTC ground shake)
This image points out the piece of falling debris that was caused by the "shaking" of the ground..
Popular Mechanics responded to this by showing us a different graph, from Columbia University, that does not show the gigantic "spike" initially.Yet, the times are still correct (8 and 10 seconds), but the spike is gone. Thankfully we have video and eyewitness accounts that can verify there where explosion, prior to the collapse initiation.
PM - 9/11: Debunking The Myths
Seismic Spikes
CLAIM: Seismographs at Columbia University's Lamont-Doherty Earth Observatory in Palisades, N.Y., 21 miles north of the WTC, recorded the events of 9/11. "The strongest jolts were all registered at the beginning of the collapses, well before falling debris struck the earth," reports the Web site WhatReallyHappened.com.
A columnist on Prisonplanet.com, a Web site run by radio talk show host Alex Jones, claims the seismic spikes (boxed area on Graph 1) are "indisputable proof that massive explosions brought down" the towers. The Web site says its findings are supported by two seismologists at the observatory, Won-Young Kim and Arthur Lerner-Lam. Each "sharp spike of short duration," says Prisonplanet.com, was consistent with a "demolition-style implosion."
FACT: "There is no scientific basis for the conclusion that explosions brought down the towers," Lerner-Lam tells PM. "That representation of our work is categorically incorrect and not in context."
The report issued by Lamont-Doherty includes various graphs showing the seismic readings produced by the planes crashing into the two towers as well as the later collapse of both buildings. WhatReallyHappened.com chooses to display only one graph (Graph 1), which shows the readings over a 30-minute time span.
On that graph, the 8- and 10-second collapses appear--misleadingly--as a pair of sudden spikes. Lamont-Doherty's 40-second plot of the same data (Graph 2) gives a much more detailed picture: The seismic waves--blue for the South Tower, red for the North Tower--start small and then escalate as the buildings rumble to the ground. Translation: no bombs.
source: www.popularmechanics.com/science/defense/1227842.html?page=5&c=y
Seismographs at Columbia University's Lamont-Doherty Earth Observatory in Palisades, New York, 21 miles north of the WTC, recorded strange seismic activity on September 11 that has still not been explained.
The Palisades seismic record shows that — as the collapses began — a huge seismic "spike" marked the moment the greatest energy went into the ground. The strongest jolts were all registered at the beginning of the collapses, well before the falling debris struck the earth. These unexplained "spikes" in the seismic data lend credence to the theory that massive explosions at the base of the towers caused the collapses.
source: news.bbc.co.uk/2/hi/science/nature/1554560.stm (BBC News-Collapsing towers caused seismic shock)
The Table below translates the above graph.
| Event | Origin Time | Magnitude | Duration |
| Impact 1 at North Tower | 08:46:26±1 | 0.9 | 12 seconds |
| Impact 2 at South Tower | 09:02:54±2 | 0.7 | 6 seconds |
| Collapse 1, South Tower | 09:59:04±1 | 2.1 | 10 seconds |
| Collapse 2, North Tower | 10:28:31±1 | 2.3 | 8 seconds |
Source: www.firehouse.com/tech/news/2002/0121_terrorist.html (Firehouse.com Technology and the Terrorist Attacks: Part 3)
Lieutenant Bradley Mann, E.M.S. - "Shortly before the first tower came down, I remember feeling the ground shaking. I heard a terrible noise, and then debris just started flying everywhere. ... By the time the debris settled from the first collapse, we started to walk back east, toward West Street, and a few minutes later ... we basically had the same thing: The ground shook again, and we heard another terrible noise and the next thing we knew the second tower was coming down."
Jody Bell, E.M.T. - I lost track of time. You start to hear this rumble. You hear this rumble. Everything is shaking. Now I'm like, what the hell could that be. I'm thinking we're going to get bombed. This is an air raid. You hear this thunder, this rumbling. Then you see the building start to come down. Everybody's like, "Run for your lives! The building is coming down!"
Lonnie Penn, E.M.T. - "We felt the ground shake. You could see the towers sway and then it just came down and I never looked back once I started running."
Paul Curran, Firefighter F.D.N.Y. - "...all of a sudden the ground just started shaking. It felt like a train was running under my feet. ... The next thing we know, we look up and the tower is collapsing."
Louis Cook, E.M.T. - "I made it up onto the -- I guess you call it the concourse level, the mezzanine level, and onto the foot bridge when I started to hear -- I thought I heard an explosion of some sort, but I kind of dismissed it. I figured, ah, it's just something burning upstairs. I really didn't think of what was going on. Okay. I start going across this pedestrian bridge. I'm the only one on this bridge. I'm walking across it, and then I just remember feeling a rumble and hearing this rumbling sound that was really intense. It actually shook my bones."
source for the above 5 quotes: graphics8.nytimes.com/packages/html/nyregion/20050812_WTC_GRAPHIC/met_WTC_histories_full_01.html (Sept. 11 Oral Histories)
Stephen Evans, North America Business Corrospondent"...then somebody said that they saw an airliner go into one of those towers. Then, an hour later than that we had that big explosion from much, much lower down and I don't know what caused that."
source: www.youtube.com/watch?v=JW_jm3EEHLQ (Explosions heard a hour later...From below the WTC?)
This next video is a unique piece of footage showing the collapse of WTC 1 and it corroborates the above. The camera was not hand held, it was directly connected to the ground via a tripod, and this allowed the camera to visually capture a ground shake which occurred ~13 seconds before the building collapsed. The video also shows an object fall from the right hand side of the building moments before the camera begins to shake. The close timing of these two events indicates they are linked. Some skeptics believe that the camera as "kicked" or "jostled". I call these people "coincidence theorist", because they have to believe the camera was kicked, and then coincidently, a piece of the WTC debris fell off.
www.youtube.com/watch?v=UrPpkuw8qro (Video of WTC ground shake)
This image points out the piece of falling debris that was caused by the "shaking" of the ground..
Popular Mechanics responded to this by showing us a different graph, from Columbia University, that does not show the gigantic "spike" initially.Yet, the times are still correct (8 and 10 seconds), but the spike is gone. Thankfully we have video and eyewitness accounts that can verify there where explosion, prior to the collapse initiation.
PM - 9/11: Debunking The Myths
Seismic Spikes
CLAIM: Seismographs at Columbia University's Lamont-Doherty Earth Observatory in Palisades, N.Y., 21 miles north of the WTC, recorded the events of 9/11. "The strongest jolts were all registered at the beginning of the collapses, well before falling debris struck the earth," reports the Web site WhatReallyHappened.com.
A columnist on Prisonplanet.com, a Web site run by radio talk show host Alex Jones, claims the seismic spikes (boxed area on Graph 1) are "indisputable proof that massive explosions brought down" the towers. The Web site says its findings are supported by two seismologists at the observatory, Won-Young Kim and Arthur Lerner-Lam. Each "sharp spike of short duration," says Prisonplanet.com, was consistent with a "demolition-style implosion."
FACT: "There is no scientific basis for the conclusion that explosions brought down the towers," Lerner-Lam tells PM. "That representation of our work is categorically incorrect and not in context."
The report issued by Lamont-Doherty includes various graphs showing the seismic readings produced by the planes crashing into the two towers as well as the later collapse of both buildings. WhatReallyHappened.com chooses to display only one graph (Graph 1), which shows the readings over a 30-minute time span.
On that graph, the 8- and 10-second collapses appear--misleadingly--as a pair of sudden spikes. Lamont-Doherty's 40-second plot of the same data (Graph 2) gives a much more detailed picture: The seismic waves--blue for the South Tower, red for the North Tower--start small and then escalate as the buildings rumble to the ground. Translation: no bombs.
source: www.popularmechanics.com/science/defense/1227842.html?page=5&c=y