October 4th 2:41 pm
Scientists says this morning's steam burst at Mount St. Helens was just a "prelude."
Earthquakes indicate magma apparently is still pushing up under the volcano and could result in a real eruption. That means it could shoot ash tens of thousands of feet in the air or ooze lava on the crater floor.
This morning's burst was similar to one on Friday. It blew some dust or old ash over the crater rim to an elevation of about 12-thousand feet. Most of it fell to ground on the volcano itself.
The alert remains at Level Three, meaning an eruption is imminent.
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