At 8:32 a.m. on May 18, 1980, an earthquake triggered the largest landslide in recorded history, setting off massive explosions blasting rocks, ash, volcanic gas and steam upward and outward.
The earthquake and lateral blast that took out the north side of the mountain also took off the top 1,300 feet of the volcano.The eruption destroyed hundreds of homes and leveled 185 miles of highway.“It's difficult when you lose someone to a natural disaster like that. People are absolutely stunned when they hear your parents were killed in a volcano,” said Steve Dill.Francisco Valensuela was just west of Mount St. Helens when the mountain blew.
“I thought in fact that we were going to suffocate for a while. It was an unimaginable kind of thing to witness. You could not understand it. You could not comprehend it,” Valensuela said.KIRO 7 employees described where they were when the eruption happened.“I was still playing for the Seahawks at that time, so I was on vacation my wife in Hawaii with friends.
The disaster gave scientists a way to develop monitoring tools, improving their ability to predict eruptions and save lives.In the last few decades, satellite technology has improved dramatically, helping scientists detect movements in the earth. A team of researchers started an imaging experiment in 2019 to determine how magma gets to the surface.The only state with more is Alaska, which has five.Mount Rainier comes right behind it, then Glacier Peak and Mount Baker.
The study scored a volcano's threat factor based on factors such as the size of the volcano and population density around it.VIDEO: Volcano! Mt. St. Helens On May 18, 1980, Mt. St. Helens erupted. This is a look back at the eruption with video from the KIRO 7 archive. It first aired in 1995.KIRO 7 reporter Essex Porter covered Mt. St. Helens for another station, but remembers the event well. He describes the May 1980 eruption here.WATCH IT: Survivors, Victims' Families Visit Mt. St.
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