Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Acoustic vs. seismic waveforms

  1. May 5, 2006 #1

    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]


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

    Attached Files:

    Last edited: May 5, 2006
  2. jcsd
  3. May 5, 2006 #2

    Mk

    User Avatar

    Why do you always post in blue?
     
  4. May 5, 2006 #3

    FredGarvin

    User Avatar
    Science Advisor

    In what way are you looking to correlate them?
     
  5. May 5, 2006 #4

    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?
     
    Last edited by a moderator: May 8, 2006
  6. May 6, 2006 #5

    FredGarvin

    User Avatar
    Science Advisor

    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.
     
  7. May 8, 2006 #6
    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
     

    Attached Files:

    Last edited: May 8, 2006
  8. May 9, 2006 #7
    Seismic Stereo...


    Why are seismic waves recorded in mono instead of stereo?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Acoustic vs. seismic waveforms
  1. Adding waveforms (Replies: 2)

  2. Seismic waves (Replies: 7)

  3. Seismic Prospecting (Replies: 6)

Loading...