Volcano Monitoring

Volcanoes

Mauna Loa's threat is often misunderstood in public discourse, yet it is one of the world's most closely monitored volcanoes. As Earth's largest active volcano by volume, it has...

geography

The Three Sisters are a distinctive volcanic complex in the central Oregon Cascades, roughly 20 miles southwest of Bend. They form one of the most recognizable groupings in the...

geology

Mount Hood fumaroles are vents in the volcano’s upper slopes where steam and volcanic gases escape into the atmosphere. They form when heat from residual magma deep below driv...

geology

Several volcanoes in Alaska are under continuous monitoring because of their potential to erupt with little warning. The most frequently cited examples include Augustine, Clevel...

geology

A volcano that has been quiet for about 600 years has erupted, marking a shift from long dormancy to renewed activity. This kind of event is notable because such a long repose i...