Article: Mount St. Helens releases large ash and steam cloud.

Byline: Hal Bernton, Nancy Bartley, and Ian Ith

VANCOUVER, Wash. _ Mount St. Helens on Tuesday blew off its largest plume of steam and ash so far since it stirred to life late last month, prompting federal scientists to issue an ashfall advisory for sparsely inhabited areas northeast of the volcano.

But scientists Tuesday were also emphatic that these repeated emissions aren't necessarily a buildup to a massive eruption that would come close to rivaling the catastrophic eruption of May 18, 1980.

"There's not necessarily going to be a `big one.' People have to get that out of their minds. We need to get it out of our minds that there's some big ...

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