The Tunguska explosion occurred on June 30, 1908 over Siberia. It was a cosmic body explosion that was accompanied by an energy release equivalent to 10 megatons of TNT. The Tunguska explosion is often used as a kind of standard of destructive action. Due to the lack of comparable events, its impact on the environment is identified with the effect of nuclear explosions. However, the impact of the Tunguska explosion on the environment was very specific. The energy released during this explosion went mainly into the formation of a blast wave, and not into heat and radiation. The blast wave was so powerful that it broke windows in houses at a distance of up to 500 km from the epicenter and went around the globe. And the radiation of the explosion was so weak that trees at the epicenter remained alive. Several hundred surviving trees were found at a distance of less than 7 km from the epicenter. According to estimates made on the basis of damage to vegetation near the epicenter, the radiation energy of the Tunguska explosion was ~1% of total energy, provided that the explosion occurred at an altitude of 5 - 10 km above the epicenter. There is an assumption that in the Tunguska catastrophe we are dealing with an explosion of the cloud of a disintegrated comet, that is to say, the explosion was volumetric.
References
[1]
Vasilyev, N.V. (1998) The Tunguska Meteorite Problem Today. PlanetaryandSpaceScience, 46, 129-150. https://doi.org/10.1016/s0032-0633(97)00145-1
[2]
Kulik, L.A. (1939) Data on the Tunguska Meteorite up to 1939. ReportsoftheAcademyofSciencesoftheUSSR, 22, 520-524.
[3]
Fast, V.G. (1967) Statistical Analysis of the Parameters of the Tunguska Windfall. In: ProblemoftheTunguska Meteorite, Part 2, University Publishing House, 40-51.
[4]
Boyarkina, A.P., Demin, D.V., Zotkin, I.T. and Fast, V.G. (1964) The Study of the Shock Wave of the Tunguska Meteorite on the Destruction of the Forest Caused by It. Meteoritics, 24, 112-128.
[5]
Tsynbal, M.N. and Schnittke, V.E. (1988) About the Burn and Fire in the Area Where the Tunguska Meteorite Fell. In: Dolgov, Yu.A., Ed., Topical Issues of Meteoritics inSiberia, Nauka SO, 41-72.
[6]
Vasilyev, N.V., Kovalevsky, A.F., Razin, S.A. and Epictetova, L.E. (1981) Evidences of Eyewitnesses of Tunguska Fall (Catalogue). Tomsk University Press.
[7]
Gladysheva, O.G. (2022) Was There an Upward Atmospheric Discharge in the Tunguska Catastrophe? JournalofAtmosphericandSolar-TerrestrialPhysics, 236, Article ID: 105909. https://doi.org/10.1016/j.jastp.2022.105909
[8]
Lvov, Yu.A. and Vasilyev, N.V. (1976) Radiant Burn of Trees in the Area Where the Tunguska Meteorite Fell. In: Vasiliev, N.V., Ed., QuestionsofMeteoritics, Tomsk University Press, 53-57.
[9]
Bunch, T.E., LeCompte, M.A., Adedeji, A.V., Wittke, J.H., Burleigh, T.D., Hermes, R.E., et al. (2021) A Tunguska Sized Airburst Destroyed Tall El-Hammam a Middle Bronze Age City in the Jordan Valley near the Dead Sea. ScientificReports, 11, Article No. 18632. https://doi.org/10.1038/s41598-021-97778-3
[10]
Florensky, K.P., Vronsky, B.I., Emelyanov, Yu.M., et al. (1960) Preliminary Results of the Work of the Tunguska Meteorite Expedition in 1958. Meteoritika, 19, 103-134.
[11]
Zenkin, G.M., Ilyin, A.G., Egorshina, A.I., et al. (1963) Characteristics of Trees That Survived the Catastrophe in Its Epicenter. In: Plekhanov, G.F., Ed., The Problem oftheTunguska Meteorite, Iz-vo TSU, 84-86.
[12]
Davis, K.P. (1959) Forest Fire: Control and Use. McGrow-Hill, 584 p.
[13]
Vasilyev, N.V. (2004) Tunguska Meteorite. The Cosmic Phenomenon of the Summer of 1908. Russian Panorama.
[14]
Florensky, K.P. (1963) Preliminary Results of the Tunguska Complex Meteorite Expedition in 1961. Meteoritika, 23, 3-29.
[15]
Zenkin, G.M. and Ilyin, A.G. (1964) On the Radiation Burn of Trees in the Area of the Explosion of the Tunguska Meteorite. Meteoritics, 24, 129-140.
[16]
Voznesensky, A.V. (1925) The Fall of the Meteorite on June 30, 1908 in the Upper Reaches of the River Khatangi. Mirovedenie, 14, 25-38.
[17]
Whipple, F.J.W. (1930) The Great Siberian Meteor and the Waves, Seismic and Aerial, Which It Produced. Quarterly Journal of the Royal Meteorological Society, 56, 287-304.
[18]
Wexler, H. and Hass, W.A. (1962) Global Atmospheric Pressure Effects of October 30, 1961, Explosion. JournalofGeophysicalResearch, 67, 3875-3887. https://doi.org/10.1029/jz067i010p03875
[19]
Pokrovsky, G.I. (1960) Explosion and Its Application. Military Publishing House, 68 p.
[20]
Glasstone, S. (1962) The Effects of Nuclear Weapons. US Atomic Energy Commission.
[21]
Astapovich, I.S. (1933) New Materials on the Flight of a Large Meteorite on June 30, 1908 in Central Siberia. The Astronomical Journal, 10, 465-486.
[22]
Kissel, J. and Krueger, F.R. (1987) The Organic Component in Dust from Comet Halley as Measured by the PUMA Mass Spectrometer on Board Vega 1. Nature, 326, 755-760. https://doi.org/10.1038/326755a0
[23]
Greenberg, J.M. (1998) Making a Comet Nucleus. Astronomy & Astrophysics, 330, 375-380.
[24]
Gladysheva, O.G. (2021) Fragmentation of the Tunguska Cosmic Body. PlanetaryandSpaceScience, 200, Article ID: 105211. https://doi.org/10.1016/j.pss.2021.105211