1. GROUP 6 Piotr Marczyk (Poland) Damian Stypa (Poland) Konrad Szota (Poland)Daniel Jimeno Gregorio (Spain) Naomi Gutiérrez Frías (Spain) Raquel Rivero Dorta (Spain) Viktor (Germany)
2. Tunguska Event The event of 30th of June 1908 in the Taiga in Central Siberia (60 ° 53 8.51 ", 101 ° 53 36.71") in the region of Podkamienna Tunguzka River, north of Lake Baikal. There was a sudden vast explosion that had fallen down the trees within a radius of 40 km. It was seen within a radius of 650 km, heard within a radius of 1000 km. The very strong shock was registered on the seismographs all over the Earth, and finally - thanks to the special position of the sun during the summer solstice, due to the reflection of light by dust, which was in the air as a result of an explosion - in many European cities the phenomenon of "white night” was observed. The impact was so strong that the Russian magnetometers indicated the second north pole in the explosion region.
3. There are many mysteries and ambiguities concerning this disaster. We still do not really know what caused an explosion being so powerful. Another unsolved puzzle is the different eyewitness accounts from the area of Angara River and from the region of Lower Tunguzka; these relationships, among others stand for the different directions of the movement of the object, and for the different times, in which the object was observed. Witnesses from the area of Angara talk about the early morning, the Lower Tunguska - about the afternoon.
4. The study of the phenomenon After the bang in Tungus, a number of more or less plausible hypotheses, aimed at clarifying the cause of that phenomenon arose. To put an end to unjust speculations, in 1927 - 19 years after the explosion - the Soviet academic community has decided to send the first major scientific expedition to the Tunguska Podkamienna region. The study was conducted by Leonid Kulik of the Soviet Academy of Sciences. When you find a newspaper archive news about the event, this scholar has suggested that a giant meteorite fell in the area of Siberia. It was built of iron and nickel. To find the evidence to support this thesis, Kulik had conducted the research in the area for many years at the top Stojkowicz bogs. Exploration of Kulik expedition ended in failure – he could not find any remains of a meteorite or impact crater, but we owe it a large amount of photographic material, demonstrating the taiga landscape after the disaster. According to the Czechoslovak astronomer Lubor Kresák, who expressed his opinion on the expedition in 1978, this is a proof that the cause of the Tunguska event was a meteoroid, which was a fragment of Comet Encke being detached.
5. Hipothesis Of Korlevic In 1990 the area of disaster was visited by the scientific expedition, consisting of researchers of Russian, Bulgarian, French, Swedish origin and Croatian Korado Korlevic. This last, after ten days of sampling the ground, said that he made his view on the cause and course of the Tunguska event. According to Korlevic explosion was caused by the collision of Earth with a meteorite of the size comparable to the skyscrapers. Twenty seconds after the explosion at the small height the mushroom cloud of a hot steam at a temperature of 15 000 ° C occurred, and has "cooked" the entire impact zone - ash and sand melted to form tektites - Glass beads, found by an expedition of Kulik. According to the Croatian scientist it created a shock wave spreading in a parallel manner to the surface of the earth, which explains the destruction of forests in the area of 2150 km ² of an irregular shape. It was seen from above like a butterfly. Korlevic also explains the unusual shape of trees, which grow to this day in the region of Podkamienna Tunguska - this would be the result of the burnings resulting from fires, which took place after the fall of a meteorite.
6. The Hypothesis Of The Spacecraft There are many theories based on the fact that aliens were involved in the Tunguska catastrophe, including the catastrophe of the extraterrestrial ship or the usage of weapons to cause the impending threat to the Earth. Jan Pająk put forward the theory that the alien spaceship with a magnetic drive (magnocraft) was responsible for the disaster. The explosion released a large energy accumulated in the magnetic field.
7. Czoko Lake In June 2007, Luca Gasparini, Giuseppe Longo and, two researchers from the University of Bologna, stated that they have found a crater formed by a large meteorite impact or comet fragment at the surface of the Earth. According to them, the crater is a Czoko lake located 8 km northwest of the epicenter of the designated location. This is in accordance with the direction of the testimony of witnesses and the direction of the collapse of the trees. The oval shape of the lake differs from the other lakes in the area, and at its bottom the fragments of rock or compacted sediments have been discovered by Italian researchers. The fragments are probably the remnants of a meteorite. The lake is not marked on any maps of the area before 1929. The discovery of Italians was later criticized by Dr. Gareth Collins from London.