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Iliamna reported activity

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EVENT SPECIFIC INFORMATION

Start:May 19, 1997 Observed

Debris-avalanche, volcanic avalanche, or landslide: BibCard
Eruption Type:Not an eruption.

Description: From McGimsey and Wallace (1999): "On May 19, 1997, seismicity at Iliamna abruptly and dramatically increased. Analysis by AVO seismologists suggested that the activity probably resulted from a local avalanche or rockslide. A large avalanche of mixed snow, rock, and ice cascaded down the east flank on June 30, 1994, producing a similar seismic signature (Neal and others, 1995). An AVO field crew dispatched to make observations verified that indeed a large avalanche, composed mostly of ice and snow with some rock debris, had originated at the 7,500-foot (~2,300-meter) level and had cascaded down the east flank, mimicking the 1994 avalanche." This activity does not constitute a volcanic eruption.

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Page modified: June 11, 2014 13:55
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