Volcano Watch” is a weekly article and Big Island volcanic activity update written by U.S. Geological Survey Hawaiian Volcano ...

A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Large lava fountains erupted from the north and south vents Jan. 24 within Halemaʻumaʻu Crater — reaching heights of at least ...

Volcanoes don’t always show their activity through huge explosions or lava rivers. In many cases, the changes are quiet and ...

Effusive eruption at Mayon Volcano in Albay continues, and is now on its 22nd straight day. In its summary of 24-hour ...