On May 18, 1980, the eruption of Mount St. Helens emitted 1.5 million metric tons of sulfur dioxide into the atmosphere while its pyroclastic lava flow incinerated virtually everything within a ...
Mount St Helens, Washington viewed from Portland, Oregon. Source: Ilan Kelman The volcano Mount St. Helens in Washington state exploded at 8:32 a.m. on May 18th, 1980, exactly 40 years ago.
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