The Tunguska event took place on 30 June 1908. It was accompanied by an abnormal effect on the Earth’s atmosphere, manifesting itself through “white nights”. These nights were associated with a dispersion of cosmic matter and the formation of a field of noctilucent clouds with a uniquely large size of over 10 million km². However, overall, the cosmic matter was scattered over a territory of around 18 million km²...

The question about the nature of the object called the Tunguska meteorite, which exploded over the Siberian taiga on June 30, 1908, is the cornerstone in understanding the process of interaction of cosmic bodies with the Earth's atmosphere. If we consider it to have been an asteroid, then we have to assume that an object with a mass more than 10⁸ kg can completely...

A cosmic body entered the Earth's atmosphere on the morning of February 15, 2013 and disintegrated explosively over the Chelyabinsk region (Russia). This airburst is considered in the framework of a model describing the motion of cosmic bodies in the atmosphere. The results of these calculations have made it possible to propose an alternative scenario of the Chelyabinsk event...

The explosion of a space object occurred near the city of Chelyabinsk on February 15, 2013. The meteorite fragments reached the Earth's surface, this fact allowed us to consider this space object as a meteorite. However, this event showed a number of features not corresponding to the destruction of a meteorite. The space object began to disintegrate at an altitude of 70 km...

The approximate composition of the Tunguska meteorite remnants obtained by averaging the results of several measurements is presented. It is pointed out that the matter of the cosmic-body remnants was enriched with alkaline and alkaline-earth elements ...

Based on the fact that such events as an explosion of the Tunguska cosmic body, which caused the fall of trees in a wide area and the release of radiant energy during the Tunguska disaster, proved to be separated not only in space but also in time, it is concluded ...

A gigantic noctilucent cloud field was formed and different solar halos were observed after the Tunguska catastrophe. To explain these anomalous phenomena, it is necessary to assume that a large quantity of water was carried into the atmosphere ...

After the Tunguska catastrophe, the region of “white nights” extended southwards as far down as ~42°N at some locations. Impressive sunsets, colored in all shades of the solar spectrum were observed in the territory ...

The analysis of 700 eyewitness’s stories about the Tunguska disaster enables to have an important information about the Tunguska cosmic body, its flight and destruction. Having compared the visual sizes of the flying object with the Sun...

There is a hypothesis that fragments of a body from outer space fell to Earth as a result of the Tunguska event. During decades of investigations at the site of the disaster, stone or iron pieces from a cosmic body were not found...

An investigation of the Tunguska cosmic body’s epicenter showed that both dried trees and those that survived the catastrophe are marked with characteristic deteriorations. For the trees that survived near the epicenter...

The Tunguska catastrophe occurred in the area of the East Siberian magnetic anomaly on June 30, 1908. The epicenter of the explosive destruction of the Tunguska cosmic body (TCB) was above the central neck of a paleovolcano ...