Hokkaido, Japan, February 1958
- Date of account
- 1958-02
- Location
- Hokkaido, Japan
- Source
- uap_archive
- Record updated
- 2026-10-10
Record summary
Project Blue Book case file indexed from National Archives metadata; page-level review pending.
Published source text
Read the available text below. Archive transcriptions may contain OCR errors; later context is labelled separately. A recorded claim is not a finding that it happened.
Source page 1
Source text · mention onlyPROJECT 10073 RECORD CARD 12.CONCLUSIONS 1.DATE 2.LOCATION 口 Was Balloon 口 Probabiy Balloon 19 February 1958 Hokkaido,Japan 口 Possibiy Balloon 3.DATE-TIME GROUP 4.TYPE OF OBSERYATION 口 Was Aircraft Ground-Visuai BBround-Rodor 口 Probably Aireroft Locai 口 Possibly Aircroft 19/0059z AiVisuol Air-lntorcept Rador GMT 6.SOURCE 口 Was Astronomical 5.PHOTOS 口 Probably Astronomical Ys Sketch 口 Possibiy Astronomical ON Military Othor- Explosion 8.NUMBER OF OBJECTS 9.COURSE 7.LENGTH OF OBSERVATION 口 Insufficient Dota for Evaluation 口 Unknown euo stationary 2 hours 11.COMMENTS O.BRIEF SUMMARY OF SIGHTING Rapid deveiopment and a/c reaction Radar report from Sea of Japan area. rule out weather pagnomena and Return developed rapidly to a dense equipment malfunction. Explosion cloud that expanded to cover an area possible cause correlated with approximately 65 miles long and rose IR 1886-58 as explosion.
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