UFOMYST
CaseCircle1991

Boulder (10 miles west), CO, USA

Two glowing translucent spheres chasing and playing "tag" in the trees, one landed, one flew away.

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: 38s, a plausible sighting length
  • Moderate witness text (98 characters)
  • Location geocoded exactly
  • No other reports from this city within 3 days
When
1991-10-31
Where
Boulder (10 miles west), CO, USA
Shape
Circle
Duration
30 to 45 seconds
Geo
40.015, -105.271 · exact
Slug
circle-over-boulder-10-miles-west-co-1991-8fd6b9
Wave

Part of a wave

  • Historical wave1989–1991

    The Belgian Triangle Wave

    Belgium (Eupen, Wallonia, Brussels corridor)

    The definitive black-triangle wave: silent, slow platforms with three corner lights, reported by gendarmes, air-traffic controllers, and thousands of citizens. On the night of March 30-31, 1990, Belgian F-16s scrambled…

    Open wave →

In context

  • Boulder (10 miles west), CO shows up 1 times across the archive.
  • 6 reports came from Colorado in 1991.
  • In the 1990s, 6.7% of reports described a circle — the all-time rate is 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.