Seismic event indicating explosion at WTC

[leftysergeant]

But as seismic waves travel through the ground they become smeared out due to dispersion.

The waves from the Ruhr bombing didn't become significantly attenuated.

 

[Macgyver1968]

Here's what real explosives sound like during a controlled demolition:

http://www.youtube.com/watch?v=79sJ1bMR6VQ

Do you hear anything like that on the video?

 

[Anders Lindman]

I'll repeat myself, in bigger text this time:

Wrong...because the core columns were visible for a few seconds after the collapse. If they were severed, we would not see them at all.

Do some research...for the love of pete...

Ok, I'm not sure about the core columns. It could even be that the explosions in the basements only had the purpose of making the weakened floors collapse, and that the consecutive pancaking of the floors below happened as a consequence of the initial collapse.

 

[Anders Lindman]

The waves from the Ruhr bombing didn't become significantly attenuated.

Wouldn't that depend on how far away from from the source the seismic event was recorded?

 

[BigAl]

Ok, I'm not sure about the core columns. It could even be that the explosions in the basements only had the purpose of making the weakened floors collapse, and that the consecutive pancaking of the floors below happened as a consequence of the initial collapse.

There were no demolition explosions in the basement or anywhere else on 9/11.

 

[Sabretooth]

Ok, I'm not sure about the core columns. It could even be that the explosions in the basements only had the purpose of making the weakened floors collapse, and that the consecutive pancaking of the floors below happened as a consequence of the initial collapse.

Well, that's great, but there's one problem:

Bombs Are Not Quiet!

 

[beachnut]

I'm no expert on seismology, but that looks similar to an earthquake signature to me, which would be similar to a massive explosion in the basement.

Your claims on 911 prove the expert part. The OP title is a lie.

 

[Anders Lindman]

There were no demolition explosions in the basement or anywhere else on 9/11.

Then how can we explain that the seismic events happened some 10-12 seconds before the start of the collapses?

 

[D'rok]

Ok, I'm not sure about the core columns. It could even be that the explosions in the basements only had the purpose of making the weakened floors collapse, and that the consecutive pancaking of the floors below happened as a consequence of the initial collapse.

An explosion in the basement initiated a top-down collapse? Really?

 

[leftysergeant]

http://www.youtube.com/watch?v=xGAofwkAOlo

D'OH!

Clean the wax out of your ears and turn up the volumn on your speakers.

Do you hear that throbbing noise at the time the camera shakes?

It's a freaking helicopter. And it is very close.

Do you know what it does to a light camera on a tripod that is not firmly anchored when a helicopter passes overhead? Do you know what kinds of shock waves a helicopter creates when it is maneuvering in any way?

Stop cherry-picking the evidence.

 

[D'rok]

Then how can we explain that the seismic events happened some 10-12 seconds before the start of the collapses?

They did not. Multiple posts in this thread have already shown that your timing is off. Please go back and re-read.

 

[BigAl]

I haven't researched whether the 9/11 explosion in the basement was heard by people. I have heard a lot of talk about people hearing a big explosion, but I'm not sure when they heard that, if it was some 10 or 12 seconds prior to the start of the collapses or not.

There was an explosion in the basement of WTC1. Willy Rodriguez witnessed it and testified.

It was a gas vapor explosion.

The fire, the ball of fire, for example, I was in the basement when the first plane hit the building. And at that moment, I thought it was an electrical generator that blew up at that moment. A person
comes running into the office saying explosion, explosion, explosion. When I look at this guy; has all his skin pulled off of his body. Hanging from the top of his fingertips like it was a glove. And I said, what happened? He said the elevators. What happened was the ball of fire went down with such a force down the elevator shaft on the 58th . freight elevator, the biggest freight elevator that we have in the North Tower, it went out with such a force that it broke the cables. It went down, I think seven flights. The person survived because he was pulled from the B3 level. But this person, being in front of the doors waiting for the elevator, practically got his skin vaporized.

William Rodriquez
Transcript of NIST Public Meeting in New York City . February 12, 2004


http://wtc.nist.gov/media/Public Transcript 021204 Final1_withlinks.pdf

 

[Anders Lindman]

They did not. Multiple posts in this thread have already shown that your timing is off. Please go back and re-read.

I believe I have answered all those posts.

 

[leftysergeant]

Wouldn't that depend on how far away from from the source the seismic event was recorded?

There is not a great deal of difference in the readings from any of the targets.

 

[BigAl]

Then how can we explain that the seismic events happened some 10-12 seconds before the start of the collapses?

Because random clocks are never exactly synchronized.

 

[leftysergeant]

Then how can we explain that the seismic events happened some 10-12 seconds before the start of the collapses?

They don't. Your whole record spans 20+seconds.

So did the collapse.

 

[D'rok]

I believe I have answered all those posts.

No, you most certainly have not. Like these:

http://www.internationalskeptics.com/forums/showthread.php?postid=6343965#post6343965
http://www.internationalskeptics.com/forums/showthread.php?postid=6344065#post6344065

And this summary:

There is no explosive. It's been proven to you four separate ways now:

1. Type of ground motion (Rayleigh wave) is inconsistent with explosives
2. Timing of ground motion does not precede the collapse
3. Absence of sound caused by explosives
4. Improbable size of explosives required to match your idea

And the ones you did answer, you misunderstood.

Please go back and re-read. You might learn something.

ETA: And this one:

http://www.internationalskeptics.com/forums/showthread.php?postid=6344190#post6344190

 

[uke2se]

To bring down the core columns.

How could bombs in the basement brining down the core columns in the basement cause a collapse to start at the impact zone?

 

[Sword_Of_Truth]

source: http://www.popularmechanics.com/tec...ebunking-911-myths-world-trade-center#seismic

"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.

Dammit! You stole my post!

 

[Sam.I.Am]

Let me get this straight. Your hypothesis is as follows: (X is the visible start of the collapses)

At (X) -10 seconds explosives are detonated in the sub basement over 800 feet away from the visible collapse initiation. During that time people much less than 800 feet away heard nothing, (including people inside the buildings core structure, the most likely place to hear such explosives detonate). After 10 seconds the collapses start and last approximately 10 seconds, and then, after about an additional 15 to 30 seconds, the core columns fail with that failure being a direct result of explosives going off 35+ seconds earlier? This is what you believe?