56 45N41 10W unidentified aerial event — February 1964

On or during February 1964, at or near 56 45N41 10W, the source reports the following sequence: 200 IN THE CLEAR SIGHTED LARGE BRIGHT GREEN OBJECT ARCHING FROM 0800 TO 1100 QUARTER OF THIS WESTBOUND ACFT. OBJECT FIRST OBSERVED AS GREEN CHANGED TO VIOLET THEN ORANGE AND EXPLODED JUST BEFORE ENTERING THE UNDERCAST ESTIMATED AT 12000 TO 12220 FEET TOPS. The text in the document is as follows: AF IN: 31037 (23 FEB 64) HO/leb ACTION: NIN-7 INFO: XOPX-6, SAP-0544, ARMY-2, NAVY-2, CMC-8, JCS-35#, DIA-25, DIA-CIIC-2, OSD-15, NSA-7/1(1) SMB C224 CZCH#A442 ICOCJA923 00 RUEAH DE RUFYAW IS 23/0336Z ZNR FM S2307/2UW2 TO RUFT GH/COMUSFORAZ LAJES FLD AZORES RUEAH/COFS USAF WASH DC RUWGALB/CINCOGRAD ENT AFB COLO RUCSRB/CINSAC OFFUTT AFB NEBR BT UNGLAS CIRVIS MSG/231512 PX S643N 4110W SIGHTED OBJECT AT 8 TO 112 O'CLOCK FM ACFT PX OBJECT GREEN TO VIOLET TO ORANGE. INCOMING AP IN: 31038 (23 FEB 64) HO/ICb ACTION: NIN-7 INFO: XOPX-6, XOPX-6, SAF-OS-3, ARMY-2, NAVY-6, CMC-8, JGS-35, DIA-25 SMB C222 ZCZCHAA ISZGUO 792 00 RUEAH DE RUEXAW 14 23/3412 ZNR FM 62207/AKX2 TO RUEGLG/GOOSE AIR DEFENSE SECTOR GOOSE AB LABR RUEAHW/SAF WASHINGTON DC RUCSRR/CINCSAC OFFUTT AFB NEBR RUCKDT/COMMANDER ANTISUBMARINE FORCE US ATLANTIC FLEET NORFOLK VA RUEGHG/COMEASTAFLANT NEW YORK NY RUWGALB/CINCONAD ENT AFB COLO RGOSC/RCAF AIR DEFENSE COMMAND CANADA REF ST HUBERT MONTREAL CANADA RGOCG/CANADIAN FLAG OFFICER ATLANTIC COAST CANFLAGLANT HALIFAX NS BT UNCLAS CIRVIS REPORT AT 0312Z 9449N 4112W SIGHTED OPTION A 5 TO 1150 OCLOCK FM AICPT COLORING WAS GREEN TO VIOLOT ORANGE EXPLODED PRIOR TO HITTING CLOUD TOPS EST 12,000 FT TO 13,000 FT QAH 2007 EXPLOSION BRIGHT ENOUGH TO LIGHT UP COCKPIT BT NOTE: RETRANSMITTED TO CIA. It appears to be a page from an old Project Blue Book document, which is a United States Air Force program to investigate unidentified flying objects (UFOs).