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Infrasonic observations of chemical explosions

Study on the infrasonic observations of chemical explosions, including measurements of angle-of-arrival, trace velocity, source localization, and a possible propagation model.

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Infrasonic observations of chemical explosions

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  1. Infrasonic observations of chemical explosions Ludwik Liszka Swedish Institute of Space Physics

  2. Swedish-Finnish Infrasound Network

  3. Geographical coordinates of infrasound stations

  4. Explosions:

  5. Explosion site:

  6. Directions and distances to the explosion site

  7. Scalograms of typical signals at both stations, August 22, 2008 Kiruna Jämtön

  8. Multifrequency measurements of the angle-of-arrival

  9. Angle-of-arrival as a function of frequency, August 22, 2008 Jämtön Kiruna

  10. Angle-of-arrival and trace velocity of the broad-band signal, September 1, 2008

  11. Angle-of-arrival for different frequencies, September 1, 2008

  12. Trace velocity for different frequencies, September 1, 2008

  13. Source localization, September 1, 2008

  14. Hilbert-Huang transform

  15. First four IMF:s on Sep 1, 2008 IMF1 IMF3 8 Hz 0 UT, minutes IMF4 IMF2

  16. IMF1 Hz UT, minutes

  17. IMF2

  18. IMF3

  19. IMF4

  20. The fine structure of IMF1

  21. Angle-of-arrival derived from the IMF1 Jämtön Kiruna

  22. Source localization, September 1, 2008. Comparison with localization using the HHT IMF1

  23. Standard deviations of derived latitude and longitude as a function of day no., Aug 13 – Sep 11,2008

  24. Sodankylä radiosonde dataAug 13 – Sep 11,2008 EW wind NS wind Sound velocity

  25. Sound velocity

  26. EW windpositive towards W

  27. NS windpositive towards S

  28. A possible propagation model

  29. Scalograms of typical signals at both stations, August 22, 2008 Kiruna Jämtön

  30. A possible propagation model

  31. A possible propagation model

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