k 1981 Gas Sampling around the Mount St. Helens Dome USGS geologists gathered samples by hand from vents on the dome and crater floor. Additionally, sulfur dioxide gas was measured from a specially equipped airplane before, during, and after eruptions to determine emission rates for the volcano. 9241981 Editorial Stock Photo - Afloimages
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1981 Gas Sampling around the Mount St. Helens Dome USGS geologists gathered samples by hand from vents on the dome and crater floor. Additionally, sulfur dioxide gas was measured from a specially equipped airplane before, during, and after eruptions to determine emission rates for the volcano. 9 24 1981
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1981 - Gas Sampling around the Mount St. Helens Dome

USGS geologists gathered samples by hand from vents on the dome and crater floor. Additionally, sulfur dioxide gas was measured from a specially equipped airplane before, during, and after eruptions to determine "emission rates" for the volcano. 9/24/1981

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190738803

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Editorial

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10-06-2022

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