Mount Rainer May Be the Most Dangerous U.S. Volcano [View all]

[Yo_Mama_Been_Loggin]

Supervolcanoes sound terrifying, but the risks they pose don’t usually match their fearsome reputations. Yellowstone in particular often makes its way into headlines, as every earthquake swarm or change in geyser activity spawns unfounded rumors of an apocalyptic eruption.

However, ask a volcanologist where the real risk in the U.S. lurks, and there’s a good chance that they will turn their gaze to the Pacific Northwest.

Nestled among the Cascade mountain range sits Mount Rainier, a postcard-perfect natural wonder—and a volcano that causes scientists genuine concern. It’s unclear when it will stir from its long slumber, and there’s no sign that anything is imminent. Nevertheless, a future eruption could cause one of the worst natural disasters in the U.S. (See pictures of the 10 most dangerous volcanoes in the U.S.)
Unlike its infamous cousin, Mount St. Helens, Rainier is not known to be particularly explosive. And yet, Janine Krippner, a volcanologist at Concord University, is unequivocal in her assessment.

“Rainier is one of the most dangerous volcanoes in the world,” she says. “It’s a huge concern.”

To make the case, Krippner points to Colombia’s Nevado del Ruiz volcano, which experienced a notorious eruption in November 1985. In that event, neither lava nor pyroclastic flows of hot gas and ash were the killer elements. Instead, the paroxysm quickly melted the volcano’s summit glaciers, and fresh floodwaters rapidly entrained and mobilized the loose sediment on the volcano’s flanks.

This activity set off a series of lahars: viscous, violent slurries that rushed down toward the town of Armero at about 30 miles an hour as its residents slept. The town and its inhabitants were smothered within mere moments. The eruption is now known as one of the worst volcanic disasters in human history, killing around 23,000 people.

This volcanic hazard is the reason a future eruption at Rainier could prove to be so deadly. The United States Geological Survey (USGS) has carefully mapped and studied the sleeping colossus, and it’s clear that the valleys on its slopes are perfect for lahar formation, with several suburbs of the Seattle-Tacoma metropolis sitting right in the path of disaster.

“Lahars can lift houses. They can overtake a bridge. They can take the bridge with it,” Krippner says. In the past, lahars from eruptions filled up valleys to heights of almost 500 feet along Rainier’s viridian flanks.

https://www.msn.com/en-us/weather/topstories/this-may-be-the-most-dangerous-us-volcano/ar-BBL1LFL?li=BBnb7Kz