Infrasound from Lightning and Sprites
Thunder properties and mechanisms have been mostly studied between 20 and 40 years ago. Infrasonic signal (frequency lower than 20 Hz), also called infrasound, has been measured in parallel to acoustic signal when lightning occur. Recent technical developments and new interest to infrasound revive research about thunder. A European measurement campaign, dedicated to sprite research, has been organised in 2005. This paper shows new results about descriptions of infrasound from lightning: maximum distance from which this kind of infrasound can be detected, infrasound frequency spectrum from 0.1 to 10 Hz completing previous ones acquired above 1 Hz. More recently, it has been shown that also sprites produce infrasound. Three-dimensional locations of infrasound sources associated to infrasound from sprites are calculated using only infrasound characteristic when sprites are close to an infrasound station.
KeywordsInfrasound Thunder Lightning Sprites
Unable to display preview. Download preview PDF.
- Bedard, A. J., Jr., W. A. Lyons, R. A. Armstrong, T. E. Nelson, B. Hill, and S. Gallagher, A search for low-frequency atmospheric acoustic waves associated with sprites, blue jets, elves and storm electrical activity, Eos Trans. AGU, 80(46), Fall Meet. Suppl., F227 (1999).Google Scholar
- Few, A. A., Acoustic radiations from lightning, in The Earth’s Electrical Environment, 46–60 pp., Washington, DC: National Academy Press (1986).Google Scholar
- Neubert, T., T. H. Allin, E. Blanc, T. Farges, C. Haldoupis, A. Mika, S. Soula, L. Knutsson, O. van der Velde, R. A. Marshall, U. Inan, G. Satori, J. Bor, A. Hughes, A. Collier, S. Laursen, and I. L. Rasmussen, Co-ordinated observations of transient luminous events during the EuroSprite2003 campaign, J. Atmos. Sol. Terr. Phys., 67, 807–820 (2005).CrossRefGoogle Scholar
- Pasko, V. P., and J. B. Snively, Mechanism of infrasound radiation from sprites, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract AE23A-0899, San Francisco, CA (2007).Google Scholar
- Rakov, V. A., and M. A. Uman, Lightning, Physics and Effects, Cambridge: Cambridge University Press (2003).Google Scholar
- Uman, M. A., The Lightning Discharge, 377 pp., London: Academic Press (1987).Google Scholar
- Vivas Veloso, J. A., D. R. Christie, P. Campus, M. Bell, T. L. Hoffmann, A. Langlois, P. Martysevich, E. Demirovik, J. Carvalho, and A. Kramer, Status report on the establishment of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) International Monitoring System (IMS) infrasound network, J. Acoust. Soc. Am., 112, 2352–2352 (2002).Google Scholar