Acoustic vs. seismic waveforms

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Discussion Overview

The discussion revolves around the correlation of atmospheric acoustic waveforms and ground seismic waveforms resulting from a charge detonation. Participants explore the theoretical and practical aspects of analyzing these waveforms, including their mathematical representations and potential relationships in the context of building implosions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions the feasibility of correlating acoustic and seismic waveforms without original source data.
  • Another participant proposes a classical approach to correlate acoustic amplitudes with seismic amplitudes, specifically in the context of building implosions and vacuum pressure effects.
  • A participant mentions a potential solution regarding the chronological timeline of seismic and acoustic events related to the collapse of One World Trade Center.
  • There is a query about the recording of seismic waves in mono rather than stereo, indicating a technical curiosity about the methods used in seismic data collection.

Areas of Agreement / Disagreement

Participants express differing views on the ability to correlate the waveforms without original data, and the discussion remains unresolved regarding the specific relationships between acoustic and seismic signatures in the context of detonation events.

Contextual Notes

Some limitations include the absence of original source data for accurate correlation, and the discussion involves assumptions about the nature of waveforms during building implosions.

Orion1
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Is it possible to correlate the atmospheric acoustic vs. ground seismic waveforms from a charge detonation?

Are there any physicists on this forum that recognise the acoustic and seismic waveform signatures from a charge detonation?

Acoustic, Seismic wave function equation:
[tex]\psi (x,t) = A \sin (\omega t - k x)[/tex]

Acoustic, Seismic wave equation:
[tex]\nabla^2 \phi = \frac{1}{v^2} \frac{\partial^2 \phi}{\partial t^2}[/tex]

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Reference:
http://www.911review.com/errors/wtc/imgs/wtc1level.jpg
http://www.911eyewitness.com/images/wtc1summary01.jpg
http://uscrisis.lege.net/911/911seismic.gif
 

Attachments

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  • wtc1level.jpg
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Why do you always post in blue?
 
In what way are you looking to correlate them?
 
In what way are you looking to correlate them?

To measure the properties of the energy source(s).

En absentia of the raw computer data source information, the attachment is my first attempt at a classical approach at correlating the acoustic amplitudes with the seismic amplitudes properties.

Is there a correlation?

When a building implodes, does it collapse into its negative amplitude spike corresponding to a vacuum pressure after the previous positive energy amplitude spike resposible for the primary implosion initiation?

In simpler terms, do buildings implode under vacuum pressure?
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Honestly I don't think you'd be able to do it without the original source data. However, I would pass you along to someone who I have seen do work in this area. You should try to get a hold of Tom Irvine over at VibrationData.com. I have seen him do seismic analysis on manmade events like this before. He does sometime post in the Vibration section of Engineering Tips.com as well.
 
seismic chronology...



I believe that I have found a solution to the seismic-acoustic chronological timeline.

The attachment is my second attempt using zero-time chronology.

EDT = UTC - 4:00:00

Seismic:
One World Trade Center collapses:
14:28:?? UTC
10:28:35.714 A.M. EDT

duration = 40 s - data start to data end

Acoustic:
duration = 31.19 s - peak 1 to peak 6a
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Attachments

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Seismic Stereo...


Why are seismic waves recorded in mono instead of stereo?
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