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During eruptive pulses, the edge of the volcanic plume expanded and contracted very rapidly - almost vibrating - probably due to steam forming and condensing rhythmically around the hot erupting lava. Video courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program.

Related Links

Submarine Ring of Fire 2006

Submarine Ring of Fire 2006: April 29 Log

NOAA Ocean Explorer Gallery