The Long Valley Caldera in northern California is waking up, and scientists are monitoring it. This supervolcano, whose last blast was some 100,000 years ago, isn’t leading up to another monstrous ...

The Long Valley Caldera, a massive supervolcano in California, has been causing unease among researchers due to its potential ...

The city of Mammoth Lakes sits on the edge of the Long Valley Caldera formed around 700,000 years ago. This caldera is 15 miles in diameter and is North America's second largest. 1. The Long ...

Fears are mounting over the potential eruption of a supervolcano in California, which has been dormant for hundreds of thousands of years. The Long Valley Caldera, spanning 20 miles long, 11 miles ...

“Another 800,000 people live just outside the depression.” The second supervolcano is the Long Valley Caldera in eastern California, which last erupted approximately 100,000 years ag ...