UVB-76

Introduction

UVB-76, also known as "The Buzzer", is a shortwave radio station that broadcasts a short, monotonous buzz tone, repeating at a rate of approximately 25 tones per minute, 24 hours per day. It has been broadcasting since the late 1970s. The source of the broadcast is generally agreed upon to be located in Russia, and the station is widely believed to be operated by the Russian military.

A photo of a nondescript, industrial-looking building, possibly a radio station, in a remote, wooded area.

History

The first reports of a station on this frequency date back to 1973. The station was first observed to be broadcasting a buzzing tone in early 1982. The buzz tones typically continue for 24 hours per day, interrupted only by voice messages in Russian. These messages are typically cryptic series of numbers and words, and their meaning remains a mystery.

A vintage black and white photo of a room full of old radio equipment, possibly from the 1970s or 1980s.

Signal Characteristics

The signal transmitted by UVB-76 occupies a narrow frequency band, with the buzzer signal itself being a monophonic buzzing tone that repeats at a rate of approximately 25 tones per minute. Each buzz tone lasts for about 1.2 seconds. The pitch of the tone is approximately 4625 kHz.

A close-up photo of a radio dial, with the needle pointing to a frequency around 4625 kHz.

Voice Messages

Occasionally, the buzzing signal is interrupted by a voice message in Russian. These messages typically consist of a series of numbers and words, often including Russian names. The exact purpose and meaning of these messages remain unknown, but they are widely believed to be coded messages.

A close-up photo of a microphone in front of a radio console.

Location

The exact location of the UVB-76 transmitter is not publicly known, but it is widely believed to be located in Russia. The signal has been traced to a location near the town of Povarovo, Russia, but it is unclear whether this is the actual source of the transmission or merely a relay station.

Aerial photo of a remote, wooded area with a single, industrial-looking building in the center.

Theories and Speculation

Due to the mysterious nature of UVB-76, numerous theories and speculations have arisen regarding its purpose and operation. Some believe it to be a "numbers station," broadcasting coded messages to spies or military personnel. Others speculate that it may be a form of psychological warfare, or even a signal to trigger a doomsday device.