Harbingers

The thing that appears before disasters. Seen, the files claim, at Chernobyl too.

The 'harbinger' pattern — anomalous sightings clustering before disasters — rests on Point Pleasant (sightings ended with the Silver Bridge collapse, per Keel's chronology) and retroactive reports before Chernobyl ('blackbird of Chernobyl,' traced by researchers to post-hoc folklore with no contemporary documentation). The documented mechanism is memory reorganization after trauma: disasters recruit preceding anomalies into narrative. The node files the pattern's one strong case (Point Pleasant's contemporaneous record) against its weak imitations, linked to Mothman.