Helens eruption, the US Geological Survey set up an lahar detection system at Mount Rainier in 1998, which since 2017 has been upgraded and expanded. About 20 sites on the volcano’s slopes and ...

One of the world’s oldest national parks, Mount Rainier became part of the federal ... one of the world’s most active volcanoes. The Sicily, Italy, volcano is almost constantly in a state ...

Millions of people around the world live near one of the roughly 1,500 active volcanoes on Earth—from Italy’s Campi Flegrei to Indonesia’s Merapi to the United States’ Mount Rainier.