Mount St. Helens Photos: the US's Most Disastrous Volcanic Eruption

In 1980, Mount St. Helens erupted, killing dozens and forever changing how the US monitors earthquakes. The volcano is still active but not erupting.

Related Keywords

Montana ,United States ,Canada ,Idaho ,Washington ,Vancouver ,British Columbia ,Chicago ,Illinois ,Seattle ,Johnston Ridge ,Eastern Washington University ,Liz Westby ,David Johnston ,Charlie Crisafulli ,Forest Service ,Helens Institute ,Volcano Observatory ,Seattle Times ,Cascades Volcano Observatory ,