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HOME/CASES/DUFO-014 · PETROZAVODSK PHENOMENON
FILE OPENEDTIER B · CLASS — DECLASSIFIED
DUFO-014 · DOSSIER · 2026 EDITION
FILE DUFO-014·FIELD REPORT·RUSSIA·FILED 09.20.1977·UPDATED 05.06.2026
CASE FILE

PETROZAVODSK.

Petrozavodsk · Russia · A giant jellyfish-shaped object with luminous rays hovered over the Soviet city of Petrozavodsk for 12 minutes, leaving pitted marks on windows and sending rays into buildings.
declassifiedtier · BFILE COPY · 14 / 64
Petrozavodsk Phenomenon — exhibit A
EXHIBIT A · 01 / 07
“primary witness on record” — Thousands of Petrozavodsk residents
DEBRIS
PRESS
MAP
WITNESSES
GOV DOCS
MEDIA
// SUMMARY · BY THE DESK

At approximately 4:00 a.m.

The sighting was reported by TASS — the official Soviet news agency — in an almost unprecedented acknowledgment. Residents described rays penetrating their window glass, leaving small circular pitted holes. Multiple weather stations and shipping vessels on Lake Onega reported the phenomenon simultaneously, providing independent geographic triangulation of the object's position and movement.

The Soviet Academy of Sciences, which officially dismissed UFO phenomena, quietly formed a working group to investigate. Multiple Soviet scientists published papers speculating about the object's nature. KGB files later revealed the event had been treated as a serious unexplained security incident. Finnish authorities also received reports from across the border.

The Petrozavodsk event is significant in the history of Soviet UFOlogy because it is one of the rare cases where the official Soviet state media acknowledged the phenomenon rather than suppressing it. The physical evidence left in window glass — analysed by Soviet researchers — showed patterns inconsistent with any known natural phenomenon. No satisfactory conventional explanation has ever been accepted.

// CHRONOLOGY · KEY EVENTS
Sep 20 1977
Incident reported · primary record
1978
First independent investigation
2023
Senate UAP testimony reopens record
May 2026
Spielberg release · disclosure cycle
// WITNESSES · 4 ON RECORD
portrait
Thousands of Petrozavodsk residents
ON RECORD
▸ AFFIDAVIT →
portrait
Multiple Soviet officials
ON RECORD
▸ AFFIDAVIT →
portrait
Weather station personnel
ON RECORD
▸ AFFIDAVIT →
portrait
Lake Onega shipping crews
ON RECORD
▸ AFFIDAVIT →
// PRIMARY DOCUMENTS
TASS news agency reports — September 1977▸ ARCHIVE
Soviet Academy of Sciences investigation▸ ARCHIVE
Felix Zigel — Moscow Aviation Institute▸ ARCHIVE
FILE DUFO-014 · PETROZAVODSK PHENOMENON · DECLASSIFIED EDITION 2026PG 01 / 04
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