Eruption Type: Explosive
ColHeight:30 m * 30 m above summit crater.

Start: November 4, 1998    Observed


Description: From McGimsey and others (2003): "On November 4, 1998, AVO received word from the U.S. Coast Guard (USCG) of a possible ashFine fragments (less than 2 millimeters across) of lava or rock formed in an explosive volcanic eruption. plume above the summit craterA steep-sided, usually circular depression formed by either explosion or collapse at a volcanic vent. of Shishaldin Volcano. The report reads, 'Ash and smoke extending up to 100 ft above volcanoA vent in the surface of the Earth through which magma and associated gases and ash erupt; also, the form or structure (usually conical) that is produced by the ejected material. ventAn opening in the Earth's surface through which magma erupts or volcanic gases are emitted.; dark in color. Puffs approximately 10 minutes apart.' This type of activity is typical of Shishaldin and probably reflects a continuing high-level heat source and intermittent phreatic explosive activity within the summit crater."

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