Russia's mysterious 'doomsday radio station' made rare broadcast before Putin invaded Poland's airspace: What is it?

Before Russian drones were shot down by Nato and Polish aircraft in Poland's airspace, cryptic messages were broadcast on what has been dubbed "doomsday radio", a shortwave station in Russia that has been active since the Cold War. Russia’s chilling 'doomsday radio station' sent its first message in months, and what remains is speculation of what it could be used for.

The Russian radio station that dates back to the Cold War is believed to have sent out its first rare ‘message’ in months, with experts claiming it probably wasn’t for ‘peaceful purposes’. ‘The Buzzer’ is a Russian shortwave radio station known for broadcasting short, monotonous tones lasting between one to 1.2 seconds.

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What is 'Doomsday Radio' in Russia?

According to NewsWeek, the mysterious radio station UVB-76 is thought to be linked to Russia's military. The radio station in Russia has been broadcasting since the 1970s on 4625 kHz and is occasionally interrupted by voice transmissions which prompt speculation about their meaning.

The white noise came to life again on Monday when cryptic voice messages of numbers and letters were heard, sparking a lively discussion on social media. The buzzer repeats roughly 21–34 pulses per minute, often lasting about 1 to 1.2 seconds each, followed by pauses of approximately 1 to 1.3 seconds.

Its signature tone became a bit of an obsession amongst radio enthusiasts when Estonian tech entrepreneur Andrus Aaslaid started streaming it online in June 2010, as reported by WIRED. Over time, the station occasionally broke its droning loop with cryptic voice messages. And throughout the years, these interruptions have featured Russian names, letters, or seemingly random words and numbers.

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UVB-76 has been active for five decades and is widely believed to be a numbers station operated by the Russian military although this has not been confirmed. Theories abound ranging from its role as a "doomsday station" which can trigger nuclear launches to an outlet that transmits secret messages.

Also known as "The Buzzer," UVB-76 is famous for transmitting a steady buzzing sound about 25 times per minute. However, on Monday, the usual monotone was briefly disrupted by a series of messages in Russian, consisting of numbers, names, and codewords.

A 64-second recording, which quickly went viral on social media, captured a male voice reciting: "Nicolai, Zhenya, Tatyana, Ivan." The initials NZhTI match a call sign the station has used previously, according to the independent Russian news outlet Meduza.

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Following this, the voice lists the numbers 38, 965, 78, 58, 88, 37, and then reads out more names: "Olga, Tatiana, Elena, Leonid." The initials spell OTEL — the Russian word for "hotel." The message concludes with the speaker saying, “soft sign, 78, 58, 88, 37.” The “soft sign” is a letter in the Russian alphabet that doesn’t have its own sound but modifies the pronunciation of the preceding consonant.

This sparked a wide debate on social media, suggesting that the numbers represented coordinates "for unknown listeners far from the motherland." Another suggested the codes were signals for Russia's nuclear submarine fleet intended to scare President Donald Trump before he makes decisions on sanctions. Back in May, the station broadcast the same code 'NZhTI" as well as 89905 BLEFOPUF 4097 5573' before the phone call between President Vladimir Putin and Donald Trump.

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How did it get the name?

The radio station is thought to be operated by the Russian military from one of the country's western regions although neither its location nor its purpose have been confirmed, according to the report. It earned the nickname 'Doomsday station'due to a theory it's part of the Soviet-era Dead Hand, or Perimeter system, a nuclear fail-safe mechanism that would trigger a launch of nuclear weapons if the broadcast were to stop.

The newspaper Rossiyskaya Gazeta reported that the station's activity increased after the collapse of the Soviet Union from once every few years before 1992 to messages weekly or even daily by the 2000s. It fell silent on June 5, 2010 for 24 hours and has broadcast sounds ranging from fragments of Tchaikovsky's Swan Lake, to shuffling footsteps and even a woman's scream.

In the lead-up to Russia's February 24, 2022 invasion of Ukraine the station was quite active with codes sent in the days leading up to the war.