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You got proven wrong, then your only resort is personal attacks.
Again. There is nothing in the seismic evidence by wave type and by frequency to indicate explosives cut structural members.
How was i proven wrong?
FILTERED is the word; getting rid of that chopper frequency Hz, as i kindly instructed you to replicate(which you did not). Seconds from NISTs "collapse inition" is what remains; 8 large booms.
originally posted by: democracydemo
a reply to: neutronflux
Seismic? I'm addressing air sound waves.
Sound travels in solids and liquids too
Sound waves travel faster and more effectively in liquids than in air and travel even more effectively in solids. This concept is particularly hard to believe since our general experiences lead us to hear reduced or garbled sounds in water or behind a solid door. There are reasons for this. Most of our everyday experiences are when a sound travels first through air and then through water or a solid. When the sound wave transfers from air into a solid some of it is reflected back into the air and some may be absorbed by the new medium. The noise coming from a room will be reduced if an observer outside closes the door. Sound from within the room will travel to the closed door and start it vibrating. The vibrating door will set the air on the outside vibrating too and a little of the original sound will be transmitted to the observer. However, some of the sound arriving at the door will have been reflected back into the room (actually making the noise inside the room louder!). Also some of the sound energy will have been used up in making the door begin to vibrate so we can say some of the sound has been absorbed by the door.
www.le.ac.uk...
originally posted by: democracydemo
a reply to: neutronflux
And the source that would make air waves would make seismic waves. But there is no evidence in the frequencies and wave types in the seismic date to indicate explosives.
You know full well the complexity within what you are claiming. Overcomplicating the subject i.e. diverting to seismic in this case, is what you do, for your peace of mind. This behavior is repetitive.
originally posted by: democracydemo
a reply to: neutronflux
And the source that would make air waves would make seismic waves. But there is no evidence in the frequencies and wave types in the seismic date to indicate explosives.
You know full well the complexity within what you are claiming. Overcomplicating the subject i.e. diverting to seismic in this case, is what you do, for your peace of mind. This behavior is repetitive.
originally posted by: democracydemo
originally posted by: democracydemo
a reply to: neutronflux
And the source that would make air waves would make seismic waves. But there is no evidence in the frequencies and wave types in the seismic date to indicate explosives.
You know full well the complexity within what you are claiming. Overcomplicating the subject i.e. diverting to seismic in this case, is what you do, for your peace of mind. This behavior is repetitive.
Too high expectations on you Neutron as it seems, i misread you.
You do not understand the complexity to what you claim, do you really believe
air waves=seismic waves
by default in this scenario? If so, we are talking top shelf ignorance.
originally posted by: neutronflux
The Jets that hit the towers had around 10,000 pounds of fuel. With large amounts of fuel in the wing tanks.
If you don’t think a 68,000 pound slug of fuel traveling over 400 mph can take out building structures, then you are clueless about physics.
Then you have the landing gear, wing bases, and engines that are made out of more durable alloys than the skin of the jet.
A B-25 bomber weighing 25,000 pounds, and flying 200 mph punched a hole through the Empire State Building. Vs a 767 flying over 400 mph and weighing over 200,000 lbs hitting a building cheaply clad.
A subterranean explosion might not be heard, but the ground would shake and initiate a series of waves (body and surface waves). If we distinctly hear an explosion, it is either aerial, which does not give a seismic signal, or it is subaerial, in which case surface waves could be generated.
originally posted by: democracydemo
a reply to: neutronflux
Feels like feeding a toddler, but since information is king, here comes the aeroplane:
Were Explosives the Source of the Seismic Signals Emitted from New York on September 11, 2001? By Dr. André Rousseau
Please do consume it fully, and prove that an aerial explosions would have shown in seismic.
You can start from page 7 for your convenience.
A subterranean explosion might not be heard, but the ground would shake and initiate a series of waves (body and surface waves). If we distinctly hear an explosion, it is either aerial, which does not give a seismic signal, or it is subaerial, in which case surface waves could be generated.
and prove that an aerial explosions would have shown in seismic.
Is not an “aerial” explosion if the explosives are strapped to the vertical columns connecting to the ground.
Even if standard controlled demolitions do not create seismic waves (because the explosions are aerial), it is useful to compare the data from the World Trade Center on 9/11 with seismic data obtained during the controlled demolition of other buildings such as the Kingdome in Seattle (Pacific Northwest Seismograph Network, 2000) and at Oklahoma City (US) (Holzer et al., 1996).
The case of the Kingdome is particularly interesting because seismologists expressly asked that the explosions be measured (in order to take advantage of the occasion to gather research data), and those in Oklahoma City were part of a reconstruction, using explosives, of the partially destroyed Alfred P. Murrah Federal Building.
These two examples involved a powerful subaerial explosion and the emitting of Rayleigh waves. Furthermore, the falling of the debris had no seismic consequences, even at distances well below 34 km (less than 7 km and 26 km respectively). Only the seismic equipment situated close to the source during the reconstruction of the bombing in Oklahoma City was able to record the seismic energy created by the collapse of the building.
Why would the jet impacts create seismic data when they took out parts of the structure, but not your fantasy planted explosives?
In conclusion, even if a seismic wave could be created in a steel column, it would hit the ground only in the form of seismic noise, and as the passage from metal to rock is a refraction that absorbs energy, there would not be much left to propagate in the ground.
And. The seismic data is free of resultant frequencies from explosives settings of during collapse, but registers the start of the building collapse.
seismic noise
In geophysics, geology, civil engineering, and related disciplines, seismic noise is a generic name for a relatively persistent vibration of the ground, due to a multitude of causes, that is often a non-interpretable or unwanted component of signals recorded by seismometers.
Physically, seismic noise arises primarily due to surface or near surface sources and thus consists mostly of elastic surface waves. Low frequency waves (below 1 Hz) are commonly called microseisms and high frequency waves (above 1 Hz) are called microtremors. Primary sources of seismic waves include human activities (such as transportation or industrial activities), winds and other atmospheric phenomena, rivers, and ocean waves.
en.m.wikipedia.org...
In conclusion, even if a seismic wave could be created in a steel column, it would hit the ground only in the form of seismic noise, and as the passage from metal to rock is a refraction that absorbs energy, there would not be much left to propagate in the ground.
In solids, the molecules are composed in a lattice with a lot of strong intermolecular bonds. This causes the molecules to be really close as solids are very dense, like the mosh pits of the most br00tal bands in existence. Because of this, the waves in a solid travel very very fast, and usually are too fast to be audible, and are considered to be more of pressure waves. Pressure waves are part of the same spectrum as sound waves, but are caused by faster waves. The waves are normally just pressure forces, like pushing an object, your hand pushes some molecules, which push other molecules, which push other molecules... in a wave. So most sound waves in solids are just pressure waves.
socratic.org...