Bizarre rock formation known as Medusae Fossae weren't created by UFOs crash-landing, but rather by massive volcanism on the Red Planet.
The U.S. Geological Survey defines a volcano as a vent in Earth's surface, either on land or on the seafloor, from which molten rock called magma, as well as ash and gases, can erupt or ooze. Different types of volcanoes erupt in different ways, with some erupting spectacularly and others, most notably Hawaii's shield volcanoes, steadily oozing lava. There are different types of volcanoes, including stratovolcanoes, shield volcanoes and cinder cones, and different types of lava and other volcanic flows. Volcanoes can be active, dormant or extinct. Most of Earth's volcanoes are located along the Pacific Ring of Fire, where many of Earth's tectonic plates subduct beneath another plate. Currently volcanic eruptions cannot be predicted, though most of the big, active volcanoes are routinely monitored and authorizes warn when they think an eruption is likely. Read below for the latest news on volcano monitoring and research, current volcanic eruptions and to see amazing pictures of volcanoes.
A volcanic eruption in Guatemala that spewed out ashy plumes and scorching-hot lava on Sunday (June 3) has killed at least 33 people, according to news reports.
Eerie blue flames flared from the ground on Hawaii's Big Island on Tuesday night (May 22), marking a rarely seen phenomenon that can arise during volcanic eruptions.
Lava bombs are red-hot cannonballs of gooey lava, and they are incredibly dangerous for people near an eruption.
Earth would look a lot more like Mars if a mysterious mineral wasn't sucking iron out of the planet's crust. Scientists think they now know the culprit — and it's a gemstone.
On the Big Island of Hawaii, one of the world's most active volcanoes has been spewing lava since 1983.
While rounding up cows before the crack of dawn last week, a New Zealand farm worker happened upon a gaping gouge in the earth.
Lava from the Kilauea volcano smothered roads and burned down trees and houses in what was a tumultuous weekend for Hawaii's Big Island.
A magnitude-5.0 earthquake shook the Big Island of Hawaii on Thursday (May 3), causing lava to spew into a residential subdivision.
But researchers are now closer than ever to understanding how magma got into the hot bowels of the supervolcano where it lies today.
For some NASA scientists, the extreme environments they study aren't on a distant planet or moon — they're right here on Earth.