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originally posted by: skyeagle409
That has been proven false. No sound of explosions as WTC 7 collapsed, no explosive evidence found in dust samples of the RJ Lee Group and no evidence of demolition explosions within the seismic data.
originally posted by: skyeagle409
...and no evidence of demolition explosions within the seismic data.
Here is the sound of an explosion prior to WTC7 collapsing..
originally posted by: skyeagle409
a reply to: Debunkology
That is not the sound of demolition explosion, that is the sound of structural failure.
originally posted by: skyeagle409
a reply to: twitchy
It is not an opinion
Yes it is, and if eyewitness testimony trumps armchair warrior
9/11 Seismic Recordings
Brent Blanchard devotes section 4 of his paper to the issue of seismic recordings on 9/11. Blanchard is Senior Editor of ImplosionWorld, a website which posts details of explosive demolitions, and also Director of Field Operations at Protec Documentation Services, Inc. Protec works in the field of vibration monitoring and structure inspection, a key service to both the construction and demolition industries.
Vibration monitoring performed by independent experts has long been considered crucial for companies carrying out explosive demolition, because owners of nearby buildings are keen to sue if any cracks or other structural damage appears.
The field seismographs used by Protec and others provide the key scientific evidence for disturbances that may have caused damage, and there were a number of such seismographs operated by Protec on 9/11 in the vicinity of Ground Zero, for monitoring construction sites. Blanchard tells us that data from these machines, and seismographs operated elsewhere, all confirm single vibration events recording the collapse. None of them record the tell-tale 'spikes' that would indicate explosive detonations prior to collapse.
This evidence makes a compelling argument against explosive demolition. The laws of physics dictate that any detonation powerful enough to defeat steel columns would have transferred excess energy through those same columns into the ground, and would certainly have been detected by at least one of the monitors that were sensitive enough to record the structural collapses.
However, a detailed analysis of all available data reveals no presence of any unusual or abnormal vibration events.
www.jnani.org...
August 8, 2006: No Explosives Used in WTC Collapse, Says Demolition Industry Leader
Brent Blanchard, a leading professional and writer in the controlled demolition industry, publishes a 12-page report that says it refutes claims that the World Trade Center was destroyed with explosives.
www.implosionworld.com...
originally posted by: skyeagle409
To sum it up, there was never a case for explosives at ground zero.
originally posted by: skyeagle409
which is evident by the fact no demolition explosions are heard on video.
originally posted by: SkepticOverlordThe video and audio has no investigative value.
WTC Seismic Spikes
Lamont-Doherty Earth Observatory of Columbia University
"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.
www.ldeo.columbia.edu...
www.popularmechanics.com...
Seismic Evidence Points to Underground Explosions Causing WTC Collapse
-Chrs Bollyn
Lerner-Lam told AFP that a 10-fold increase in wave amplitude indicates a 100-fold increase in energy released. These "short-period surface waves," reflect "the interaction between the ground and the building foundation," according to a report from Columbia Earth Institute.
"The seismic effects of the collapses are comparable to the explosions at a gasoline tank farm near Newark on January 7, 1983," the Palisades Seismology Group reported on Sept. 14, 2001.
One of the seismologists, Won-Young Kim, told AFP that the Palisades seismographs register daily underground explosions from a quarry 20 miles away. These blasts are caused by 80,000 lbs. of ammonium nitrate and cause local earthquakes between Magnitude 1 and 2. Kim said the 1993 truck-bomb at the WTC did not register on the seismographs because it was "not coupled" to the ground.
Experts cannot explain why the seismic waves peaked before the towers hit the ground. Asked about these spikes seismologist Arthur Lerner-Lam, director of Columbia University's Center for Hazards and Risk Research told AFP, "This is an element of current research and discussion. It is still being investigated."
"Only a small fraction of the energy from the collapsing towers was converted into ground motion," Lerner-Lam said. "The ground shaking that resulted from the collapse of the towers was extremely small."
Last November, Lerner-Lam said, "During the collapse, most of the energy of the falling debris was absorbed by the towers and the neighboring structures, converting them into rubble and dust or causing other damage -- but not causing significant ground shaking,"
Evidently, the energy source that shook the ground beneath the towers was many times more powerful than the total potential energy released by the falling mass of the huge towers.
originally posted by: SkepticOverlordSo why not shelve the unproductive debate and focus on something that might come to plausible conclusions?
originally posted by: sg1642
In amongst all the bickering and arguing have any of you stopped to think that 1) the towers may have just collapsed because of the fires 2) the terrorists may have had help from the global intelligence community and 3) some of that help could have been from American intelligence?
There doesn't have to have been explosives planted for it to have been a lie.
You're not seeing the forest for the trees.