Russia has been operating a mysterious radio station known as UVB-76 since at least the late 1970s or early 1980s. The station is best known for broadcasting a repetitive, monotonous hum, often called "The Buzzer" or "the hummer." This hum consists of a 1.2-second sound followed by a pause of 1 to 1.3 seconds, repeating 21 to 34 times per minute. Until 2010, each tone lasted about 0.8 seconds, but over time, the hums have lengthened and deepened, suggesting a possible mechanical origin. Some observers believe the signal may be generated by a physical device rather than an electronic one, and there have been instances where the station seemed to fail, requiring manual intervention—such as in 2016, when a person was heard hitting the device to restart it. When the hum stops, a voice takes over, reciting names and numbers in Russian. The most famous interruption occurred on December 24, 1997, when the hum was replaced by a series of beeps followed by a male voice announcing: "I am UVB-76. 18008. BROMAL: Boris, Roman, Olga, Mikhail, Anna, Larisa. 742, 799, 14." This format—names used as phonetic codes followed by numbers—has become the signature of the station. Voice messages from UVB-76 were once very rare, but in 2010, the call sign changed to "MDZhB" without explanation. Over the following months, the station broadcast 25 voice messages, and then another 56 between October and December 2010. Since then, the station has experienced periodic bursts of activity, sometimes with unusual intensity. In June 2026, amateur radio monitors recorded an exceptional burst of activity. Between 16:44 and 17:10 Moscow time, the station transmitted seven distinct voice messages in just 26 minutes, an unusually high level of activity. This included 29 code words spread over 20 messages, with terms like "spring," "support," and "peninsula" used without any clear connection to their literal meanings. By late August 2026, another peak occurred, with about 25 coded messages transmitted on August 27, marking a period of unusually concentrated activity. No Russian government ministry has officially acknowledged using the frequency of UVB-76. The only information comes from amateur radio enthusiasts who monitor the station globally. They have detected movements of the transmitter over the years, fueling speculation and discussion in online forums. Some theories suggest the station is linked to the military, possibly serving as a command network for the Leningrad military district. Other similar stations, nicknamed "The Pip" and "The Squeaky Wheel," follow the same pattern of repetitive signals interrupted by coded messages, suggesting UVB-76 is part of a broader communication system rather than an isolated one. Despite the nickname "apocalypse radio," which has fueled speculation that the station might be linked to a nuclear trigger system, no evidence supports this connection. Analysts emphasize the need for caution in interpreting the messages, as a word that seems dramatic on its own might be part of an encrypted message where the literal meaning is irrelevant. Some transmissions may even be dummy traffic meant to mimic operational orders. What stands out is the consistency of the station: nearly 50 years of uninterrupted operation, manually maintained when it fails, and continuously monitored by enthusiasts who archive every second of its broadcasts. While governments remain silent, it is amateur radio operators around the world who create the only ongoing record of this enigmatic frequency.