Chapter
Mount St. Helens Eruption Eyewitness Accounts
30:38 - 37:26 (06:48)
Eyewitnesses recount the moment when Mount St. Helens erupted in 1980, describing the massive fracture that shot across the mountain and the incomprehensible sight of the eruption.
Clips
Witnesses describe the incomprehensible sight of a large mountain suddenly dropping off the side during the eruption of Mount St. Helens.
30:38 - 31:44 (01:05)
Summary
Witnesses describe the incomprehensible sight of a large mountain suddenly dropping off the side during the eruption of Mount St. Helens. A pair of geologists, who had hired a plane to investigate the mountain after hearing rumblings, were able to capture footage of the event from above.
ChapterMount St. Helens Eruption Eyewitness Accounts
EpisodeWhen Mount St. Helens Blew Its Top
PodcastStuff You Should Know
Witnesses describe the eruption of Mount St. Helens in 1980, including a mile-long fracture shooting across the mountain and the north half of the mountain fluidly sliding away, captured in photos by amateur photographers and volcano chasers.
31:44 - 32:46 (01:02)
Summary
Witnesses describe the eruption of Mount St. Helens in 1980, including a mile-long fracture shooting across the mountain and the north half of the mountain fluidly sliding away, captured in photos by amateur photographers and volcano chasers.
ChapterMount St. Helens Eruption Eyewitness Accounts
EpisodeWhen Mount St. Helens Blew Its Top
PodcastStuff You Should Know
The sudden exposure of pressurized superheated water under a mountain, such as during an earthquake, can cause dangerous eruptions and explosions that do not necessarily resemble traditional volcano blasts due to the expansive nature of steam.
32:47 - 34:27 (01:40)
Summary
The sudden exposure of pressurized superheated water under a mountain, such as during an earthquake, can cause dangerous eruptions and explosions that do not necessarily resemble traditional volcano blasts due to the expansive nature of steam.
ChapterMount St. Helens Eruption Eyewitness Accounts
EpisodeWhen Mount St. Helens Blew Its Top
PodcastStuff You Should Know
The eruption of Mount St. Helens included a fast-moving cloud of heat and stones, moving at speeds up to 300 miles per hour and up to 660 degrees Fahrenheit, that disintegrated everything within an 8-mile radius of the mountain, including Harry Truman and David Johnston, along with his campsite.
34:27 - 35:50 (01:23)
Summary
The eruption of Mount St. Helens included a fast-moving cloud of heat and stones, moving at speeds up to 300 miles per hour and up to 660 degrees Fahrenheit, that disintegrated everything within an 8-mile radius of the mountain, including Harry Truman and David Johnston, along with his campsite.
ChapterMount St. Helens Eruption Eyewitness Accounts
EpisodeWhen Mount St. Helens Blew Its Top
PodcastStuff You Should Know
Summary
Learn about the devastating effects of the Mt. St. Helens eruption, including flooding, mudslides, and lahars (a powerful mudslide-like phenomenon). The earthquake triggering the eruption also caused incredible landslides in the area.