Federal Grand Jury To Hear Evidence - World Trade Center 9-11 Was Controlled Demolition.

Ok one more

In fact, the recording for WTC1 (Fig. 2a) demonstrates the three types of wave characteristic of a brief explosive source confined in a compact, solid material: a P wave with a speed of 6000 m/s, the typical value for a very consolidated crystalline or sedimentary terrain (which is the case in the bedrock of Manhattan), an S wave with a speed of 3500 m/s, and a surface wave with a speed of 1800 m/s (a Rayleigh wave). These values match with those registered from an earthquake or seismic prospecting (see for example Kim et al. 2001).

On the other hand, the recording linked to WTC2 (Fig. 2b) does not show the P or S body waves observed for WTC1 but only the surface Rayleigh wave, for which the spreading of the amplitudes over the duration is different from that of WTC1. The propagation speed of 2125 m/s is also markedly different from that of WTC1. Further, this wave seems to be followed by a second Rayleigh wave four seconds later.

We find the same thing for WTC7 (Fig. 2c), where the calculation of the speed of the wave according to the determined origin time indicates a Rayleigh wave with a 2200 m/s speed. Note that the amplitudes are comparable to those of the waves emitted at the time of the crashing of the airplanes into the Towers. This wave seems to be followed by a second Rayleigh wave 6 or 7 seconds later.

In the three cases, the bell-like form points to an impulsive source of energy, not percussion on the ground due to the fall of debris. The total mass and the average mass of individual building fragments were relatively small and fell to the ground over a period of more than ten seconds (which is a very long time in geophysics). Also note that the duration of a seismic signal does not tell anything about the source, contrary to the amplitude and particularly the frequency

911truth.org...

You really want to keep going?

Edit to add:
Here are the figures from the analysis I posted again that just you can't be bothered to look at before debating.

a reply to: neutronflux

And just to drive it home to you just how foolish you look.



Are we done?

originally posted by: tadaman
a reply to: mrthumpy

Only as standard as sky scrapers were when first built.

If you think it's absurd then you have not read much of mid century planners.

They wanted to nuke the ionosphere and the moon out of curiosity.

You think a 1 KT nuke would make them bat an eye?

Especially when the application can be precise to a few meters.

Let’s go with you thinks a 1 kt nuke was used? Is that what you think?

1kt should equate a 5.5 magnitude with of seismic activity. Is that false?
web.mst.edu...

What was the magnitude of the WTC seismic activity again?

a reply to: neutronflux

You pretended to know what P and S waves were. For 18 pages.

You badgered me and anyone else over something you don't understand even on a basic level.

Because you can't or won't believe this is possible? So say God told you.

The facts stand, my ignorant, belligerent friend.

You will walk with me eventually.

originally posted by: tadaman
a reply to: neutronflux

And just to drive it home to you just how foolish you look.

Are we done?

No. You posted a seismic wave with only one distinct wave component. P and S waves are two distinct wave components.

en.m.wikipedia.org...

Primary waves (P-waves) are compressional waves that are longitudinal in nature. P waves are pressure waves that travel faster than other waves through the earth to arrive at seismograph stations first, hence the name "Primary". These waves can travel through any type of material, including fluids, and can travel nearly 1.7 times faster than the S waves. In air, they take the form of sound waves, hence they travel at the speed of sound. Typical speeds are 330 m/s in air, 1450 m/s in water and about 5000 m/s in granite.

Secondary waves Edit
Main article: S-wave
Secondary waves (S-waves) are shear waves that are transverse in nature. Following an earthquake event, S-waves arrive at seismograph stations after the faster-moving P-waves and displace the ground perpendicular to the direction of propagation. Depending on the propagational direction, the wave can take on different surface characteristics; for example, in the case of horizontally polarized S waves, the ground moves alternately to one side and then the other. S-waves can travel only through solids, as fluids (liquids and gases) do not support shear stresses. S-waves are slower than P-waves, and speeds are typically around 60% of that of P-waves in any given material.

Surface waves Edit
Seismic surface waves travel along the Earth's surface. They can be classified as a form of mechanical surface waves. They are called surface waves, as they diminish as they get further from the surface. They travel more slowly than seismic body waves (P and S). In large earthquakes, surface waves can have an amplitude of several centimeters.[4]

Rayleigh waves Edit
Main article: Rayleigh wave
Rayleigh waves, also called ground roll, are surface waves that travel as ripples with motions that are similar to those of waves on the surface of water (note, however, that the associated particle motion at shallow depths is retrograde, and that the restoring force in Rayleigh and in other seismic waves is elastic, not gravitational as for water waves). The existence of these waves was predicted by John William Strutt, Lord Rayleigh, in 1885. They are slower than body waves, roughly 90% of the velocity of S waves for typical homogeneous elastic media. In a layered medium (like the crust and upper mantle) the velocity of the Rayleigh waves depends on their frequency and wavelength. See also Lamb waves.

a reply to: neutronflux

Cut and paste embarrassed furry. You did this to yourself.



You don't know the basics of this even though you pretended to. You lied. Are fake.

Do better.

a reply to: tadaman

You do understand for a normal earthquake, the interactions of the P and S waves at the surface results in Rayleigh Waves. You keep posting the WTC seismic charts that only show one wave component, which is a surface wave.

The WTC seismic charts have only one wave component which are Rayleigh waves. There is not a second and not a third wave component, so there is no P and S waves on the charts you provide of the WTC. You debunked yourself.

You are your own worst enemy.

Forensic Seismology


blogs.scientificamerican.com...

The analysis of seismic waves provided also insights on what happened September 11, 2001 in New York. Seismograph stations around the city recorded the signals generated by the aircraft impacts and the subsequent collapse of the two towers of the World Trade Center (the Lamont-Doherty Cooperative Seismographic Network provides a rich collection of datasets of the seismic activity around N.Y.). The collapse of the south tower generated a signal with a magnitude of 2.1 and the collapse of the north tower, whit a signal of magnitude 2.3, was recorded by 13 stations ranging in distance from 34 to 428km.
Also these seismograms show a distinct pattern if compared to the pattern caused by a natural earthquake. There are no P or S Waves, but the impacts of the buildings on the ground generated a sudden peak of short-period Rayleigh Waves.

What do you not get”There are no P or S Waves, but the impacts of the buildings on the ground generated a sudden peak of short-period Rayleigh Waves.”

originally posted by: tadaman
a reply to: neutronflux

And just to drive it home to you just how foolish you look.

Are we done?

You are pointing to different amplitudes along a single wave component.

If the chart had three different waves, there would be three different wave components, each would have its iwn frequencies and amplitudes.

A P-wave is one of the two main types of elastic body waves, called seismic waves in seismology. P-waves travel faster than other seismic waves and hence are the first signal from an earthquake to arrive at any affected location or at a seismograph. P-waves may be transmitted through gases, liquids, or solids.

A P wave would be discernible from background first.

In seismology, S-waves, secondary waves, or shear waves (sometimes called an elastic S-wave) are a type of elastic wave, and are one of the two main types of elastic body waves, so named because they move through the body of an object, unlike surface waves.[1]

The S-wave moves as a shear or transverse wave, so motion is perpendicular to the direction of wave propagation. The wave moves through elastic media, and the main restoring force comes from shear effects.[2] These waves do not diverge, and they obey the continuity equation for incompressible media:

The S wave would start to be a second wave component appearing out background after the P wave. S waves move through the earth differently, so would not be the same line as a P wave.

P waves, S waves, and Rayleigh waves all travel through the earth differently. They each generat their own separate line on a seismic chart with different frequencies, travel axis, and different amplitudes.

Sorry, the chart you keep posting is only a surface wave. There is no other 2nd wave component, and not a third wave component.

a reply to: neutronflux

Thats not accurate. You are a liar. You wasted a lot of time. At least I got to articulate this all.

You do not need such nonexistent types of graphs to determine if a nuclear device was used.

Look to other seismic charts where such is shown.

You literally dont even know how to read the chart.

Care to explain why a lack of atmospheric readings from an entirely different type of instrument is relevant to a discussion on seismic data?

You quoted a lack of such, ATMOSPHERIC readings.

Are you seeing the light yet?

originally posted by: tadaman
a reply to: neutronflux

Thats not accurate.

The arrows are pointing to just three different amplitudes of a single wave component that is a Rayleigh wave. There is not a second and not a third wave component. I am sorry, but you keep posting the WTC seismic chart which only shows a single wave component that is a surface wave.

S waves P waves and Rayleigh waves travel through the earth at different frequencies and direction of movement. If all three were in the WTC seismic chart, there would be three different individual lines of seismic waves.

a reply to: tadaman

Again the definitions of P, S, and Rayleigh Waves.

Primary waves (P-waves) are compressional waves that are longitudinal in nature. P waves are pressure waves that travel faster than other waves through the earth to arrive at seismograph stations first, hence the name "Primary". These waves can travel through any type of material, including fluids, and can travel nearly 1.7 times faster than the S waves. In air, they take the form of sound waves, hence they travel at the speed of sound. Typical speeds are 330 m/s in air, 1450 m/s in water and about 5000 m/s in granite.

Secondary waves Edit
Main article: S-wave
Secondary waves (S-waves) are shear waves that are transverse in nature. Following an earthquake event, S-waves arrive at seismograph stations after the faster-moving P-waves and displace the ground perpendicular to the direction of propagation. Depending on the propagational direction, the wave can take on different surface characteristics; for example, in the case of horizontally polarized S waves, the ground moves alternately to one side and then the other. S-waves can travel only through solids, as fluids (liquids and gases) do not support shear stresses. S-waves are slower than P-waves, and speeds are typically around 60% of that of P-waves in any given material.

Surface waves Edit
Seismic surface waves travel along the Earth's surface. They can be classified as a form of mechanical surface waves. They are called surface waves, as they diminish as they get further from the surface. They travel more slowly than seismic body waves (P and S). In large earthquakes, surface waves can have an amplitude of several centimeters.[4]

Rayleigh waves Edit
Main article: Rayleigh wave
Rayleigh waves, also called ground roll, are surface waves that travel as ripples with motions that are similar to those of waves on the surface of water (note, however, that the associated particle motion at shallow depths is retrograde, and that the restoring force in Rayleigh and in other seismic waves is elastic, not gravitational as for water waves). The existence of these waves was predicted by John William Strutt, Lord Rayleigh, in 1885. They are slower than body waves, roughly 90% of the velocity of S waves for typical homogeneous elastic media. In a layered medium (like the crust and upper mantle) the velocity of the Rayleigh waves depends on their frequency and wavelength. See also Lamb waves.

Each one one has a distinct speed and direction of movement through the earth. Therefor, each would make its own individual line on a seismic chart. That is by definition.

a reply to: neutronflux

You have no clue. So dumb.

Surface waves still travel through the crust. BODY waves, S and P, travel deeper.

It's about depth.

At no point does a seismometer detect anything above ground....like atmospheric readings.

In the chart, you see the first wave hit, the time is recorded and then the second component of the wave hits, and that creates the surface wave in the earth. Not the air.

The graph is all about TIME. The arguments around the seismic data for 911 stem from inconsistencies in the data and the official interpretation which give an inconsistent time table of cause and effect for what was recorded.

The AMPLITUDE for the waves increases 20X. That is explained officially as the tower first swaying, and then collapsing. That is not possible. Hence, grand jury.

You literally don't know how to read the graph.

You are pretending.

a reply to: tadaman
Again
What do you not get about

“Instead the seismic waves excited by impacts and collapses at the WTC are short-period surface waves, i.e. seismic waves traveling within the upper few kilometers of the crust.
www.ldeo.columbia.edu... “


The above is from a published paper by


“A Morning That Shook the World: The Seismology of 9/11

blogs.ei.columbia.edu...

Their first product, coauthored by 12 Lamont seismologists and grad students, was a November 2001 paper published by the American Geophysical Union describing the waves generated by the attacks, their potential effects, and the precise timing of each event. “




I am sorry that you don’t get the seismic data from the WTC determined by “12 Lamont seismologists and grad students” is not comprised of P and S waves.

a reply to: tadaman

You

Surface waves still travel through the crust. BODY waves, S and P, travel deeper.

Then why does the WTC seismic chart you post only have a single wave component, not three?

The only thing you posted was the changing in amplitude of the Rayleigh wave.

The seismological data also doesn't paint a picture of hundreds of tons of steel and concrete crashing down from height. Oh wait, the "crashing" pulverized it all. a reply to: neutronflux

a reply to: neutronflux

It does not have only one wave component.

Why are you pretending to be able to read the chart?

It is very clearly there.

Ok champ, show me a proper chart.

a reply to: tadaman

What don’t you get that “12 Lamont seismologists and grad student” notes there “is “Instead the seismic waves excited by impacts and collapses at the WTC are short-period surface waves, i.e. seismic waves traveling within the upper few kilometers of the crust”

There are no P and S waves.

a reply to: neutronflux

Ok champ, show me a proper graph. When you do also show me how to read it.

When you are done, I can actually teach you how to read a seismic graph like the ones we are discussing.

Waiting.

originally posted by: tadaman
a reply to: neutronflux

It does not have only one wave component.

Why are you pretending to be able to read the chart?

It is very clearly there.

Ok champ, show me a proper chart.

It’s is a single line with without another wave for a P wave and not a third wave for the S wave.

The chats your refereed to only shows a single wave, not three.

a reply to: neutronflux

Show me a proper chart. Explain to me how to read it.

When you are done, I will teach you how to read the ones we are discussing.

Waiting.