UFOMYST
CaseDiamond2018

Castro Valley, CA, USA

A strange craft in the night sky with white and colored lights is just hanging over southern Alameda county. It is not moving but high

Report quality: Moderate55/100

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
  • Detailed witness text (134 characters)
  • Location geocoded exactly
  • No other reports from this city within 3 days
When
2018-10-06
Where
Castro Valley, CA, USA
Shape
Diamond
Duration
1 hour
Geo
37.694, -122.086 · exact
Slug
diamond-over-castro-valley-ca-2018-0bf454
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

  • Castro Valley, CA shows up 32 times across the archive.
  • 331 reports came from California in 2018.
  • In the 2010s, 1.5% of reports described a diamond — the all-time rate is 1.4%.

Nearby in space & time

within 30 days

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.