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Mt. St. Helens volcano (USA), activity update: strong ash plume caused by partial dome collapse

di, 30 mei 2006, 17:13
17:13 PM | DOOR: TOM PFEIFFER

On 29 May at 09h08 local time, an ash and gas plume rose to 5-6 km altitude above the new lava dome of Mt. St. Helens. As CVO reports, the event was not caused by explosive activity, but rather intense degassing and a partial collapse of the new lava dome, accompanied by a quake of magnitude 3.1.

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