Silent Supervolcano Poses Threat to 15 States in the US

Buzzline

Beneath Yellowstone National Park rests one of the planet's most extensive volcanic systems — a supervolcano that experts warn is accumulating pressure in a magma chamber larger than Los Angeles. Recent geological findings from 2026 reveal that seismic activity under the caldera has surged by 20 percent compared to the past decade's average. A major eruption could cover as many as 15 states in volcanic ash within 72 hours, impacting air travel, farming, and water resources throughout the western United States. Specialists from the USGS Yellowstone Volcano Observatory emphasize that while the immediate risk to humans is minimal, monitoring systems have identified unusual readings not recorded since 2014.

Transcript

00:00Beneath the beautiful landscape of Yellowstone, something enormous is stirring.

00:04Scientists at the USGS Yellowstone Volcano Observatory

00:08have recorded a 20% uptick in seismic activity beneath the caldera

00:13compared to the last decade.

00:15Yellowstone sits above one of the most powerful volcanic systems on Earth.

00:19Its magma reservoir spans an area larger than Los Angeles.

00:23If it erupts at full scale, geologists estimate volcanic ash

00:28would blanket up to 15 U.S. states within 72 hours.

00:31The fallout could disrupt aviation routes, damage crops,

00:35and threaten water supplies across the American West.

00:38The last major eruption occurred roughly 640,000 years ago,

00:43and scientists continue to monitor the system closely.

00:47The USGS says the current risk remains low,

00:50but the 2026 readings are the strongest signal seen since 2014.

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