Transmissions on the frequency – known as “The Buzzer” – appear to originate from deep in the swamps near St Petersburg.
No one knows why it is broadcast, or who it is broadcast to, but every day since the 1970s it has been sending out its creepy signal.
It plays a strange buzzing noise, occasionally broken up by Russian words and numbers, and was first recorded in 1982.
Russia’s ghost radio – also known as MDZhB – was first heard in the late 70s, and theories about what it means have raged ever since.
“There is absolutely no information about this signal”
Professor David Stupples
Conspiracy theorists have suggested it may be giving orders to spies, to Russian soldiers, or even be connected to alien research.
The noise has occasionally changed over the years but has always involved regular buzzing followed by a Russian voice – reading out cryptic words like “dinghy” or “farming specialist”.
The frequency is believed by experts to belong to the higher-ups in the Russian military, but they also admit they have “no information” about the signal.
One prevailing theory is that the Russian buzzer works as a “Dead Man’s Switch”.
This means when the buzzing stops – such as if there was a nuclear strike against Russia – it would launch an automatic nuclear strike.
Odd radio signals and cryptic codes characterised the Cold War.
North Korea is believed to still use a signal to transmit orders to spies.
A Soviet cosmonaut undergoes weightlessness training in 1962
Professor David Stupples, an expert in signals intelligence from City University, London, said: “There is absolutely no information about this signal.”
The most commonly believed theories are relatively simple.
Firstly, the radio station is used by the Russian government in moments of crisis, such as war.
And secondly, the Buzzer is simply a marker being used to claim the frequency.
Russian warships sail during the Navy Day parade in Kronshtadt, a seaport town in the suburb of St. Petersburg
Russia allegedly tested the the Buzzer is an alert system as recently as 2013.
Maris Goldmanis, a radio enthusiast, claimed to have heard a bizarre message over the radio when the voice said “command 135 issued”.
But despite the theories, Russia’s ghost station remains broadcasting and its purpose remains a mystery.