UFOMYST
CaseCircle1977

Calumet City, IL, USA

Perfectly round with blue and orange perimeter lights. Windows all around the perimeter.

Report quality: Moderate51/100

This score reflects report-quality signals on file — how complete, corroborated, and precisely located the report is — not a claim about whether the sighting was a real craft.

  • Duration parsed: 60s, a plausible sighting length
  • Moderate witness text (88 characters)
  • Location geocoded exactly
  • No other reports from this city within 3 days
When
1977-07-10
Where
Calumet City, IL, USA
Shape
Circle
Duration
1 minute
Geo
41.616, -87.529 · exact
Slug
circle-over-calumet-city-il-1977-ccbfbb
Wave

Part of a wave

  • Historical wave1977–1978

    Colares & Operação Prato

    Ilha de Colares and the Baixo Amazonas, Pará, Brazil

    The most physically aggressive wave on record. Luminous objects — locals called them 'chupa-chupa' (sucker-sucker) — descended nightly over fishing villages, projecting beams that left burns, puncture marks, anemia and…

    Open wave →

In context

  • One of 2 documented reports from Calumet City, IL in the UFOMYST archive.
  • Illinois logged 13 sightings in 1977.
  • Circle sightings ran at 10.5% during the 1970s (archive average: 10.6%).

Report

Full narrative lands with dossier import for famous cases, or the NUFORC free-text summary above for standard reports. This shell is SSR-ready: one D1 row (including connections_json) per page.