Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...

You get a double feature for the latest Annotated Volcano. Why two volcanoes? I wanted to explain the difference between two different shapes of volcanoes: the archetype stratovolcano and the massive ...

Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

Editor’s note: The KOIN 6 Weather team is presenting weather and science lessons to help serve our teachers and students. Click here for more lessons. PORTLAND, Ore. (KOIN) – The mighty mountains of ...

Is there anything more spectacular than a towering lava fountain? Think about what it is: glowing red molten rock being shot into the sky, potentially hundreds or thousands of feet. As ubiquitous and ...

Students use volcanic ash data to determine the source of a possible supervolcanic eruption that occurred in the western United States. Supervolcanic eruptions are extremely large eruptions that ...

Deep inside the Earth’s crust, magma reservoirs hold back immense potential energy, waiting to be unleashed in powerful eruptions given the right amount of seismic activity. Studying that activity is ...

Volcano Watch” is a weekly article and activity update written by Hawaiian Volcano Observatory scientists and affiliates.

It comes as no shock that a potentially new type of volcanic lightning had long eluded scientists: The bolts can be as short as about 3 feet (1 meter) long and last just a few milliseconds. But ...