Soviet authorities quickly launched an official investigation into the Dyatlov Pass incident. The lead investigator, Lev Ivanov, initially concluded that the Dyatlov Pass victims had perished due to "compelling natural forces," but the investigation was closed soon after with no further explanation provided. The case files were archived, and the incident faded into obscurity for several years.
However, the lack of a conclusive explanation and the eerie details of the case led to rampant speculation and numerous Dyatlov Pass theories. Some of the most popular theories include:
Avalanche Theory
One widely accepted explanation is that the group was caught in a sudden avalanche, forcing them to flee the tent in a panic. Proponents suggest that the force of the avalanche caused the severe internal injuries, while the missing body parts were the result of scavenging animals after the hikers died.
Infrasound-Induced Panic
Another theory posits that the hikers were victims of a rare weather phenomenon known as infrasound. High winds blowing around Dead Mountain may have created a vortex that produced low-frequency sound waves, believed to cause panic, anxiety, and irrational behavior. In this state, the hikers may have fled their tent in terror, ultimately succumbing to the elements.
Secret Military Testing
Some researchers suggest that the hikers may have inadvertently stumbled upon a secret Soviet military test, possibly involving parachute mines or other experimental weapons. The strange injuries, radiation, and hasty closure of the investigation have all been cited as evidence of a government cover-up. This theory gained traction after reports emerged that local villagers had seen strange orange orbs in the sky around the time of the Dyatlov Pass incident.
Yeti or Cryptid Attack
Although less scientifically grounded, some have speculated that the Dyatlov Pass victims were attacked by a yeti or other unknown creature. This theory is partly based on the violent injuries sustained by some victims and the fact that their tent was slashed open from the inside, as if they were trying to escape a predator.