Source identification is one of the main research areas in infrasound. In general, a source must large to generate the low frequencies associated with infrasound since huge volumes of air must be displaced. The ability to distinguish between explosive sources and ambient noise contributes to the success of infrasound as verification technique.

• Evers, L.G. and H.W. Haak, Listening to sounds from an exploding meteor and oceanic waves
  Geophys. Res. Lett., 2001, 28, 1, 41-44, doi:10.1029/2000GL011859.
• Evers, L.G. and H.W. Haak, The detectability of infrasound in the Netherlands from the Italian volcano Mt. Etna
  J. of Atm. and Soll.-Terres. Phys., 2005, 67, 3, 259-268, doi:10.1016/j.jastp.2004.09.002.
• L.G. Evers, L. Ceranna, H.W. Haak, A. Le Pichon and R.W. Whitaker, A seismoacoustic analysis of the gas-pipeline explosion near Ghislenghien in Belgium
  Bull. Seism. Soc. Am., 2007, 97, 2, 417-425, doi:10.1785/0120060061.
• Ottemoller, L. and L.G. Evers, Seismo-acoustic analysis of the Buncefield oil depot explosion in the UK, 2005
  Geophys. J. Int., 2008, 172, 3, 1123-1134, doi:10.1111/j.1365-246X.2007.03701.x.
• Assink, J.D., L.G. Evers, I. Holleman and H. Paulssen, Characterization of infrasound from lightning
  Geophys. Res. Lett., 2008, 35, L15802, doi:10.1029/2008GL034193.
• L.G. Evers, Seismo-acoustic analysis of the infrasound events on 2010, February 03
  KNMI Technical Report (TR-314), 31 pages, 2010.

Infrasound travels through the atmosphere and can reach thermospheric altitudes of 120 km. The propagation paths are determined by the wind and temperature structure. Understanding the propagation as function of the atmospheric dynamics is important for source identification and the detectability of infrasound. Inversely, infrasound measurements can be used in acoustic remote sensing to probe upper atmospheric winds and temperatures.

• Evers, L.G. and H.W. Haak, Tracing a meteoric trajectory with infrasound
  Geophys. Res. Lett., 2003, 30, 2246, doi:10.1029/2003GL017947.
• Evers, L.G. and H.W. Haak, Infrasonic forerunners: Exceptionally fast acoustic phases
  Geophys. Res. Lett., 2007, 34, L10806, doi:10.1029/2007GL029353.
• Evers, L.G. and P. Siegmund, The infrasonic signature of the 2009 major Sudden Stratospheric Warming
  Geophys. Res. Lett., 2009, 36, L23808, doi:10.1029/2009GL041323.
• Fricke, J.T., L.G. Evers, D.G. Simons en K. Wapenaar, A Large Aperture Infrasound Array in the Netherlands for interferometric studies
  Poster: EGU General Assembly, 2010, Vienna, Austria.