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AVO learned that John Reeder (ADGGS) had information through FAA from a fisherman that a "new rock" formation had been sighted between Fire Island and old Bogoslof; this new rock was steaming, a crack extended from the top to the shore, unsure of the size (this report was from 7 July); no PIREPS today.
R/V Alpha Helix(master Tom Callahan, Inst. Marine Science, Mickey 224-5261) had a good look at Bogoslof. "It was pretty spectacular". At 2200, from 10 km west of Bogoslof, the volcano "seemed to be emitting a large amount of steam and ash". Sketch below, view from 7 km west of Bogoslof Is.
1730: 747 notes possible volcanic plume to 7900 m; dark cloud drifting NW.
1745: 747 at 10700 m reports "smoke" in vicinity of Bogoslof.
2056: Beech at 6100 m, 60 km north of Dutch Harbor saw dark gray cloud rising north-west of Bogoslof, 16 km wide at 4300-4600 m altitude; volcano appears to still be erupting but could not see volcano directly.
SIGMET issued; FAA says 50% of aircraft saw activity.