Physics of auroral phenomena : proceedings of the 35th Annual seminar, Apatity, 28 Februaru – 02 March, 2012 / [ed. board: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2012. - 187 с. : ил., табл.

V. D. Tereshchenko et al. to radiate AGW which spread in different directions and upwards from the source. The AGW modulate parameters of the ionosphere (by means of interactions of particles). It leads to generation of wave disturbances in the ionosphere. As the density of the atmosphere decreases exponentially with height, conservation of energy of disturbances leads to the situation when the amplitude of a wave grows as it spreads upwards. Therefore in the ionosphere it is possible to register disturbances which are hardly distinct on the atmospheric noise background of the surface layer. Thus on the basis of the data of the method of partial reflections it has been established, that the underwater chemical explosion was accompanied by amplification of wave activity in the polar lower ionosphere on frequencies of infrasonic and internal gravity waves. 4. Conclusions Results of radar research of acoustic action of the underwater explosion by capacity 3-7 ton of trinitrotoluene on the polar lower ionosphere have been submitted. Infrasonic and internal gravity waves were registered in the D region of the polar ionosphere during this event. Spectra and parameters of observable waves are determined. It is shown, that the most typical feature of the ionospheric response of the considered underwater chemical explosion was the pulsation of the total electron content in the mesosphere as the V-shaped wave with the periods of 6-8 minutes and with the amplitude exceeding the level of background fluctuations in 2-4 times. References Adushkin, A. V., V. N. Burchik, A. I. Goncharov, V. I. Kulikov, B. D. Khristoforov, and V. I. Tsykanovsky (2004), Seismic, hydroacoustic and acoustic actions of underwater explosions (in Russian), Physics o f burning and explosion, 40(6), 107-114. Gossard, E. E., and W. H. Hooke (1978), Waves in the atmosphere (in Russian), 532 pp., Mir, Moscow. Gokhberg, М. V., and S. L. Shalimov (2008), Influence o f earthquakes and explosions on the ionosphere (in Russian), 295 pp., Nauka, Moscow. Cole, R. (1950), Underwater explosions (in Russian), 495 pp., Inostrannaya Literatura, Moscow. Rapoport, Z. Ts. (1972), Research of the D region of the ionosphere by the method of partial reflections (in Russian), in Geomagnetism and high layers o f the ionosphere, vol. 1, pp. 172-189, VINITI, Moscow. Tereshchenko, V. D., E. B. Vasiljev, N. A. Ovchinnikov and A. A. Popov (2003), Medium wave radar of Polar Geophysical Institute for research of the lower ionosphere (in Russian), in Technical equipment and techniques o fgeophysical experiment, pp. 37-46, KSC RAS, Apatity. Tereshchenko, V. D., E. K. Poltev, V. A. Tereshchenko, O. F. Ogloblina, and E. B. Vasiljev (2011), To definition of parameters of the lower ionosphere on observations of differential absorption and phase measurements o f partial reflections of radio waves (in Russian), in Proceedings o f XXIII All-Russia scientific conference “Spreading o f radio waves ” (Yoshkar-Ola, on 23-26 May 2011), vol. 1, pp. 267-270, MarSTU, Yoshkar-Ola. Koper, K. D., Т. C. Wallace, and S. A. Taylor (2001), Forensic seismology and sinking of the Kursk, Eos Trans AGU,82( 4), 37-46. 122