Mount St. Helens, an active stratovolcano, has an elevation of 8,363 feet. It is located in Skamania County, Wash., in the Pacific Northwest region of the United States.Know More
From March 16 to May 17, 1980, Mount St. Helens experienced a series of small earthquakes, which culminated in a catastrophic eruption on May 18. At the time, it was the deadliest and most economically destructive volcanic event in the history of the United States.
The eruption impacted the size of the mountain, creating a crater 1.2 miles across east to west, 1.8 miles across north to south, and 2,084 feet deep. Prior to the eruption, it stood at 9,677 feet in elevation; it lost 1,314 feet in the eruption. The mountain lost a volume of 0.67 cubic miles.Learn more in The West
Mount St. Helens has erupted numerous times in its 300,000-year history, most notably on May 18, 1980. While much of its early history remains a mystery, geologic studies have concluded that Mount St. Helens is the most active volcano in the Pacific Northwest.Full Answer >
The modern name of this volcano was given to it by Captain George Vancouver in 1792. He named it in honor of Alleyne Fitzherbert, who was the British ambassador to Spain. Fitzherbert held the title of Baron St. Helens.Full Answer >
The eruption of Mount St. Helens at 8:32 on May 18, 1980 was a major geological event that continues to have many effects on the 150 square miles surrounding the volcano. This eruption is classified as the worst volcanic disaster in United States history. In this explosion, the mountain lost its conical tip and 1,300 feet in elevation. Fifty-seven people and hundreds of animals lost their lives.Full Answer >
The largest eruption of Mount St. Helens in recent history occurred on May 18, 1980, when a cataclysmic eruption removed most of the northern face of the mountain. At 8:32 a.m. PDT, the summit collapsed into a rock debris avalanche that released a lateral gas explosion.Full Answer >