The Three Sisters Volcano, located in the Pacific Northwest of the United States, is undergoing an intriguing geological ...

In 1669, in what has been considered the volcano’s worst known eruption, lava buried a swath of Catania, about 15 miles away ...

The largest volcanoes in Earth’s history owe their formation to powerful geological phenomena called mantle plumes—upwellings of abnormally hot rock within the Earth’s mantle that rise toward the ...