Seismic security

Yellowstone volcano: Thermometers spike as HOTTEST temperatures on Earth are recorded
Yellowstone volcano’s bubbling hot springs are proof of the supervolcano’s incredible power, even deep beneath the surface of Yellowstone Lake. Yellowstone Lake, which measures about 130 square miles, is home to one of the most diverse volcanic habitats on Earth. A new Yellowstone study has now found thermometers around the Yellowstone volcano feature spike to some of the highest levels on Earth. With scorching temperatures up to 174C (345F) hundreds of feet deep in the water, Yellowstone’s volcanic power is tremendous.

...A USGS report on the study reads: “The hottest vent measured during the HD-YLAKE study were found in the Deep Hole area just east of Stevenson Island, the deepest area of Yellowstone Lake at 410 feet (125m).
“The hottest vent measured was a whopping 345F (174C). This is much hotter than any surface hot spring at Yellowstone, because the weight from the overlying lake water acts like a pressure cooker lid and allows temperatures higher than boiling to be reached.

“Indeed, these are the hottest hydrothermal vents measured in a lake anywhere in the world.”

The researchers found the scorching water and gas seeping out of tiny holes in the lake’s bottom.