Documented and settled: the signal came from the Duga over-the-horizon radar system, two enormous arrays, one near Chernobyl, one in Siberia, built to detect American missile launches over the horizon. It operated from 1976 to 1989, interfered with commercial broadcasts and amateur radio worldwide, drew formal complaints from several governments, and ended with the Cold War. The Chernobyl array's 150-meter antenna still stands, visitable, rusting, enormous.
The claim, carried by Bearden and the psychotronic literature: ten hertz sits in the brain's alpha range, and the Woodpecker was a psychoactive carrier wave, behavior modification at continental scale, possibly coupled with weather engineering. No evidence has ever supported this; the signal's documented behavior, frequency agility, missile-correlated timing, matched early-warning radar and nothing else.
The pattern the archive keeps: a genuinely anomalous public phenomenon, heard by millions, officially unexplained for years, becomes a container for every available fear, and when the mundane answer finally arrives it cannot reclaim the narrative territory. The Woodpecker's conspiracy phase outlasted the Woodpecker.
When the whole planet can hear the signal and nobody will say what it is, what fills the silence?