Mount Rainier debris flow could do $6 ... DNR has produced an online interactive map that allows users to track the ... can be caused by volcanic activity when an eruption of lava or hot ...

Mount Rainier experienced a significant earthquake swarm, the largest since 2009, with hundreds of small quakes detected near ...

What lies beneath: Eruption path for 10-mile deep reservoir of magma deep below Mount Rainier is mapped out to try to predict flow of lava before volcano burst back to life ...

Maps of lahar risks around Mt. Rainier are coded yellow, orange and red. More than 100,000 people are at some degree of risk from lahars streaming down from Rainier.

Today's mystery concerns geological formations along the slopes of Mount Rainier in Washington State. Mount Rainier is a volcano, so we aren't surprised to see hardened lava flows left over from ...

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.

Scientists fear Washington’s Mount Rainier could trigger a swift debris flow caused by melting snow and ice. An event could endanger nearby populated areas.

The lava that spews from the fiery rims of volcanoes ... “I would regard Mt. Rainier as a much more serious short-term threat than Mt. Jefferson in Oregon, which lacks a flow path ...

Cold Lava. As it turned out though, the lava wasn't hot enough. Mount Rainier's lava was only able to melt through the thinnest parts of the glacierthose parts that were over ridges and hilltop ...

Rainier once was taller until it collapsed during an eruption 5,600 years ago to form a large crater open to the northeast, much like the crater formed by Mount St. Helens' 1980 eruption.