Tags: Mt. | St. | Helens | 'Moving'

Mt. St. Helens 'Moving'

Wednesday, 29 September 2004 12:00 AM

Seth Moran, a seismologist at the observatory, estimated the initial movement at four centimeters, about an inch and a half.

Wynn said the movement ``sort of suggests that we're getting closer'' to an eruption that could hurl rocks and ash a few thousand feet into the air.

He emphasized that the estimates were highly preliminary and inexact because there is only one measuring device on the dome, estimating scientists will need about 48 hours to interpret the data more clearly.

Scientists were keeping a close eye on the 925-foot-tall dome of hardened lava that has grown inside the crater since the May 18, 1980, eruption that blew the top off the mountain.

Swarms of tiny earthquakes - more than 1,000 since the mountain began stirring on Thursday - have gradually increased, cranking up to a level not seen since 1986, when the volcano's last dome-building eruption occurred.

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Seth Moran, a seismologist at the observatory, estimated the initial movement at four centimeters, about an inch and a half. Wynn said the movement ``sort of suggests that we're getting closer'' to an eruption that could hurl rocks and ash a few thousand feet into the...
Mt.,St.,Helens,'Moving'
148
2004-00-29
Wednesday, 29 September 2004 12:00 AM
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