Scientists used sonar and gravimeters to measure the gargantuan Pūhāhonu volcano in Hawaii — and it's the world's biggest.
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 series of 'forgotten' volcanic eruptions could explain accounts of the moon 'vanishing' in A.D. 1110.
A hiker in Hawaii rediscovered evidence of a 1935 attempt to use bombs to redirect a lava flow from Mauna Loa's flank.
The Taal volcano eruption in the Philippines this week sent ash plumes 9 miles (14 kilometers) into the air, new satellite imagery shows.
Taal volcano in the Philippines rumbled to life on Jan. 12, sending steam and sulfur skyward. Satellites have captured images of the eruption.
Taal volcano in the Philippines has erupted, and scientists are worried it could soon erupt even more violently, putting almost a million people at risk.
New Zealand medical officials have ordered 1,292 square feet of skin to treat victims of the White Island volcanic eruptions.
Five people have been confirmed dead, 31 remain in hospital with injuries and eight are still missing after sudden volcanic eruptions on White Island off New Zealand.
A volcano erupted violently on a New Zealand island today local time, sending ash up to 12,000 feet (3,700 meters) into the air, leaving five people dead and many missing.
The 2018 eruption of Kilauea in Hawaii featured the spectacular collapse of the volcano's caldera, creating a hole nearly as deep as One World Trade Center in New York City is tall at its summit.
In the early 20th century, sailors near Alaska reported seeing black bubbles seeming to boil out from the sea. They weren't wrong.
Scientists have discovered a new volcanic complex near southwestern Italy caused by an unusual type of fault.
About 100 volcanoes dating to the Jurassic era were recently discovered buried under the basins of central Australia.
A gaping hole in a dying tectonic plate beneath the ocean along the West Coast of the United States may be wreaking havoc at Earth's surface, but not in a way most people might expect.
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