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Rising crater floor signals magma movement at Mount St Helens
USGS scientists reported the crater floor rising 50 to 100 feet since Tuesday as earthquake activity remained low. The south moat near the 1,000 foot lava dome has climbed about 250 feet in two weeks, while alert levels were downgraded from volcano alert to advisory. No eruption is imminent, though a distant ash plume is possible. flights planned to sample gases and images. Associated Press.
MENTIONED IN THIS ARTICLE
Mount ST. Helens
Wash
Jake Lowenstern
U.S. Geological Survey
The
Cascades
Volcano Observatory
Vancouver
Lowenstern
Southwest
Washington
Larry Mastin
USGS