"Seismic Signals Reveal Explosives Were Used at the WTC on 9/11"

"Seismic Signals Reveal Explosives Were Used at the WTC on 9/11"

by André Rousseau

"Seismic Signals Reveal Explosives Were Used at the WTC on 9/11, according to geophysicist André Rousseau. Doctor André Rousseau, former researcher in geophysics at CNRS and specialist in sound waves, presents us with the results of his analysis of the seismic signals recorded on September 11, 2001 in New York and gives his point of view as a specialist on the question of the destruction of the three towers at the World Trade Center. Observation of the collapse of each tower shows they were each different, and this correlates with the corresponding measures of the seismic waves."

"The Relation between the Seismic Waves/Process of Collapse"

"The collapse of WTC7 is the one that comes closest to a classic controlled demolition, with the successive collapsing of the floors starting from the base which had been weakened by a subaerial explosion. As for the Twin Towers, they were first weakened by explosions at their base at the moment the airplanes crashed into them. After that we must distinguish between the parts of the building above the impact zone of the planes and those located below. If the seismic waves couldn't have been generated by the small explosions visible in the floors (which allowed for the gradual collapse from the bottom up to the impact zone) then only a powerful explosion at the base of both buildings could have accelerated the process of total ruin and produce the observed seismic waves.

In the case of WTC1, FEMA (Federal Emergency management Agency) implicitly confirms this scenario. They note that "Review of videotape recordings of the collapse taken from various angles indicates that the transmission tower on top of the structure began to move downward and laterally slightly before movement was evident at the exterior wall. This suggests that collapse began with one or more failures in the central core area of the building." (FEMA, World Trade Center Building Performance Study, chapter 2). As this transmission tower was a lattice of I Beams posed diagonally, called a "hat stress", it connected the walls of the edge to the central structure between the 107th stage and the roof and therefore reinforced the centre structure. It also supported the tower installed on the top of the building. Contrary to the official version which declared that it was the hat stress that transferred the instability of the central columns to those of the perimeter, which then gave out after they were deformed because of the pulling of the floors, the logic of the events forces us to consider that the "rupture" of the central columns came from an explosive "cutting" prior to the collapse of the building.

Conclusion: At the moment of the impact by the planes on the Twin Towers and their collapse, as well as that of WTC7, seismic waves were generated. To the degree that (1) seismic waves are only created by brief impulses, and (2) that low frequencies are associated with an energy (magnitude) that is comparable to a seismic event, these waves undeniably have an explosive origin. Even if the planes' impact and the fall of the debris from the Towers onto the ground could have generated seismic waves, their magnitude was insufficient to be recorded 34 km away, and they should have been similar.

However, the composition and magnitude of the seismic signals show significant differences, above all in their propagation speed, even though their paths were identical under identical conditions. This last difference being physically unexplainable in the official version, we must put into question the calculation of the speeds effectuated from the origin shown on the video images. We can only conclude that in reality, the (explosive) source was manually detonated, thus accounting for the variable shift for each origin in relation to the videos.

The composition of the waves is revealing both in terms of the location of the source and the magnitude of the energy transmitted to the ground. The subterranean origin of the waves emitted when WTC1 collapsed is attested by the presence of the P and S volume waves along with the Rayleigh surface waves, which are present in all five explosions. The placement of the source of the four other explosions is subaerial, attested by the unique presence of Rayleigh waves. The aerial explosions visible on the videos of the upper floors of the Twin Towers do not produce seismic waves 34 km from the source.

There is a factor of ten between the power of the explosions at the time of the impacts on the twin Towers (as well as at the time of the collapse of WTC7) and the strength of those more powerful ones at the time of their collapse, the subterranean explosion under WTC1 being the one that transmitted the most energy to the ground. Note as well that the degree to which the surface waves disperse (their speed depends upon their frequency), the duration of the recorded signal is not representative of the duration of the signal at the source. Finally, the controlled demolition of the three towers, suggested by the visual and audio testimony, as well as by observations of their collapse, is thus demonstrated by the analysis of the seismic waves emitted at the moments of the plane impacts and at the moments of the collapse."

Full article is here: - http://www.sott.net/articles/show/209899
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The technical information available pretty well establishes the "how" of how this was done. There's also an enormous amount of evidence indicating the "who" part of what really happened. Funny, you might not be all that surprised at their identity... And no, I won't tell you on this blog. But the information is there, if you look. - CP

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