ev-intel-53fe20e40305

ATSS-UFOB-278-55 — 1955-08-17 — Roseville, California

1955-08-17· Roseville, CaliforniaResolved prosaic

Strangeness (S)

0.0

Credibility (P)

1.0

Evidence (EVID)

1.0

Date conf

8.0

Loc conf

0.0

Narrative

On 17 August 1955 at approximately 2042Z, a housewife on Ground Observer Corps duty in Roseville, California observed a round, silver, basketball-sized very bright object overhead. The object moved straight up and then drifted off; observation lasted approximately 10 minutes. A balloon released from Vernalis, California was known to be in the general vicinity, and the duration, description, and drifting motion led investigators to conclude this was probably a balloon.

extracted via: llm_subagent_v1

Witnesses (1)

general vicinitynamed_pattern

Source documents (1)

Click filename to view on Internet Archive (where these are mirrored as public-domain US-government records).

23857158-003-081NARAvalue 1.2[direct]

Score evidence (6)

Why this event scored the way it did. Every contribution is traceable.

s

drift (-0.5)
outcome=resolved_prosaic (cap S<=3)
post-blend cap S<=3 (resolved_prosaic)

p

docs=1 (+0.5)
single agency (+0.5)

evid

narrative only (base 1)