Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. (CNN) — The snowcapped peak of Mount Rainier, which towers 4.3 kilometers (2.
Mount Rainier, a snowcapped volcano, looms over Puyallup Valley near Orting, Washington. The prospect of a lahar — a swiftly moving debris flow caused by melting snow and ice typically during a volcanic eruption — poses a threat to surrounding communities. The snowcapped peak of Mount Rainier, which towers 4.3 kilometers above sea level in Washington state, has not produced a significant volcanic eruption in the past 1,000 years.
“The thing that makes Mount Rainier tough is that it is so tall, and it’s covered with ice and snow, and so if there is any kind of eruptive activity, hot stuff … will melt the cold stuff and a lot of water will start coming down,” said Seth Moran, a research seismologist at USGS Cascades Volcano Observatory in Vancouver, Washington.
The eruption of the Nevado del Ruiz volcano in November 1985 devastated the town of Armero, Colombia, when a lahar killed more than 23,000 people in a matter of minutes. from Mount Rainier have reached into the surrounding area, known as the Puget Lowlands, in the past 6,000 years, Moran said. “Should it be the same size, then it’s 10 minutes to the nearest places where people are living, and 60 minutes to the nearest large communities. And those are really short time frames,” he added.two worst-case scenarios. In the first simulation, a 260 million-cubic-meter, 4-meter deep lahar would originate on the west side of Mount Rainier.
“I tried to hang on as we were being swept downstream, the bark on the trees were just scraping. … I could feel it on my legs, on my arms,” she recalled during an interview for CNN’s “Violent Earth.” The original system had low bandwidth and low power requirements due to the limitations of 1990s-era technology, which meant that data was only transmitted every two minutes.
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