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.
Latest about Volcanos
Record spike in earthquakes at Washington's 'high threat' volcano sends researchers scrambling for answers
Six earthquakes were recorded at Mount Adams in September — the highest number in a single month since records began in 1982.
'Mountain of God' volcano in Tanzania is bulging, study finds
Satellite data suggest a volcano in Tanzania that expels extremely runny lava could be creeping toward an eruption.
Tonga eruption that poured 150 metric megatons of water vapor into the stratosphere affected the atmosphere for years
A new study builds on previous research into the underwater volcano's effects on the climate.
'This could be the origin of the Atlantis legend': Mountain that sank beneath the waves discovered off Canary Islands
A large seamount with three inactive volcanoes that sank into the ocean millions of years ago off the coast of Lanzarote may have inspired the legend of Atlantis.
'Smoking terror' volcano that destroyed city 400 years ago burps toxic cloud
Earth from space A 2018 astronaut photo shows Nicaragua's active Momotombo volcano spitting out a cloud of toxic gas and steam just a few years after its latest eruption.
Volcano in Tanzania with weirdest, runniest magma on Earth is sinking into the ground
Tanzania's outlandish Ol Doinyo Lengai volcano, the only volcano on Earth that is currently erupting carbonatite lava, has been sinking at a rate of 1.4 inches per year for the past decade.
Weird new device measures how 'liquid' lava is
A new device helps scientists measure lava viscosity during active flows.
An undersea eruption rocked the Aegean 520,000 years ago
Scientists discovered an unknown volcanic eruption that rocked the seafloor in the Aegean more than 500,000 years ago.
