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Mt. St. Helens is calm.

Mt. St. Helens is calm

After a month-long eruptive episode (SN:6/15/85P.373) Mt. St. Helens is back to being benign. By the beginning of this week, earthquake activity and movement of the lava dome at the volcano in Washington state had returned to background levels, prompting the U.S. Geological Survey (USGS) to cancel its May 20 eruption advisory.

USGS scientists estimate that 247 cubic feet of material was added to the dome during the latest eruptive episode, emplacing more molten rock into the dome than any other single event since the dome first appeared in October 1980.
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Publication:Science News
Date:Jun 29, 1985
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