Strange luminous UFOs are regularly observed in the valley area. Hessdalen, Norway, which may indicate location here alien secret base. The light that people often see here, most often bright, white or yellow. He has an unknown origin and soars above a certain level above the ground. Sometimes light can be observed for more than one hour. There are also several other types of inexplicable lights that are often observed in the Hessdalen Valley. These lights were even examined by an astronomer and ufologist J. Allen Heinek in 1985. Ufologist Scott S. Waring say that according to his personal conviction the aliens have underground bases in this area, and not just frequent it. For, to discover these large alien underground populations dig vertically down to a depth of 3 to 6 km. Fancy lights were first recorded near Hessdalen in 1940s, and maybe even earlier. Especially high the activity of lights in the area took place from December 1981 to the summer of 1984, when lights were observed 15 to 20 times a week. 
Photos from open sources The frequency of such phenomena attracts here tourists from around the world in large numbers who stay here for the night to see this phenomenon. Since since then, activity has decreased, and now the lights can be observed approximately 10 – 20 times a year. One of the latest hypotheses suggests that the lights are formed by clusters of macroscopic crystals in a plasma, formed by ionization of air and dust by alpha particles during decay of radon in a dusty atmosphere.
A photo from open sources
Several physical properties (vibrations, geometric structure and light spectrum) observed in phenomena in Hessdalen can be explained through the model of dusty plasma. Decay radon produces alpha particles and radioactive elements such as polonium. In 2004, scientists recorded a higher level of radioactivity emitted rocks, near the area where a large ball was previously seen Sveta. When radon is released into the air, its solid products decay easily attached to airborne dust. New computer simulation shows that dust is immersed in ionized gas (i.e., dusty plasma) and can form a double helix. Modeling suggests that dust particles form cylindrical construction, sometimes turning into spiral structure. Some spirals have a radius that changes dramatically from one value to another and vice versa. Hessdalen lights can adopt a spiral structure. Amazing but dusty plasma may also take the form of similar structures. In general, it remains just guess, since many phenomena continue to keep secrets, which we have yet to unravel.
