UFOMYST
CaseCircle2018

Sioux Falls, SD, USA

4 lights in a pattern. 4 lights that expanded and come back to center. ((NUFORC Note: Advertising lights?? PD))

Report quality: Low35/100

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: 3600s, a plausible sighting length
  • Moderate witness text (70 characters)
  • Location geocoded exactly
  • No other reports from this city within 3 days
  • NUFORC attached a skeptical explanation note (e.g. Venus, satellite, meteor)
When
2018-03-04
Where
Sioux Falls, SD, USA
Shape
Circle
Duration
1 hour
Geo
43.544, -96.728 · exact
Slug
circle-over-sioux-falls-sd-2018-7532d8
Wave

Part of a wave

  • Historical wave2004

    The Navy Encounters & the UAP Era

    U.S. training ranges (Pacific off San Diego; Atlantic off Virginia), then worldwide reporting

    The wave that renamed the subject. The USS Nimitz 'Tic Tac' encounter (November 2004: radar drops from 80,000 ft to sea level in seconds, pilot visual by Cmdr. David Fravor, FLIR video) stayed classified-adjacent until…

    Open wave →

In context

  • Sioux Falls, SD has 70 sightings on file here.
  • 2018 brought 11 reports from South Dakota.
  • The 2010s skewed 12.3% circle reports; the archive-wide figure 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.