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Io, the innermost of Jupiter's five major moons, is roughly the same size as Earth's moon. When Voyager 1 and 2 sped past Jupiter in 1979, scientists...

Kiln hornito and small neighbor

Pu`u `O`o and upper PKK flow

Sometimes you just don't know what you're going to find, and when you do find it, you're not quite sure what it is.

Headed toward Highcastle

Along with the rest of the world, we at the U.S. Geological Survey's Hawaiʻian Volcano Observatory continue to follow the aftermath of the great...

MLK to far west arm

With great sorrow and shock, the world is bearing witness to the horrendous effects of the earthquake and tsunami that occurred in the Indian Ocean...

Murky day as 2004 staggers to its end

Several recent Volcano Watch articles have discussed the difficult nature of making specific eruption predictions about Mauna Loa, the largest volcano...