The snowcapped peak of Mount Rainier, which towers 4.3 kilometers (2.7 miles) above sea level in Washington state, has not produced a significant volcanic eruption in the past 1,000 years.

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 ...

Over the last 20 years, scientists have been upgrading and expanding lahar monitoring stations around this volcano, collectively known as The Mount Rainier Lahar Detection System. This system is ...