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New Helens lava dome one-third the size of old one

11:51 AM PST on Tuesday, December 21, 2004

Associated Press

USGS

The deep crater of Mount St. Helens.

VANCOUVER, Wash. - A new lava dome growing in the crater of Mount St. Helens is about one-third the size of the old lava dome.

The U.S. Geological Survey says since fresh magma started pushing into the mountain in October the new structure is about 1,600 feet long, 650-feet wide and 900 feet high.

In terms of volume its 35 percent the size of the lava dome that grew in the period between 1980 and 1986.

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The volcano is steaming with minor ash eruptions and small earthquakes.

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