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 other, 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. Volcanic eruptions can cause avalanches of debris, and the ash and gases they spew into the air can cause the atmosphere to cool. Currently volcanic eruptions cannot be predicted, though most important 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.
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5 Erupting Volcanoes Seen from Space (Photo)
karymsky volcano in russia
April 17th, 2014
Five volcanoes on the Kamchatka Peninsula are seen erupting from space on one satellite pass by Landsat 8.
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Volcanic Islands Prove Hottest Photo in NASA Contest
2014 Tournament Earth winner
April 8th, 2014
Wild winds stirring up choppy waves behind the Canary Islands grabbed the top spot in NASA's annual Tournament Earth photo competition.
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Satellite Images May Predict Volcanic Eruptions
volcano facts, volcano eruptions
April 3rd, 2014
Volcanology has come a long way since the days of Pompeii. Now, satellite-based systems offer a way of measuring whether a volcano is likely to erupt soon.
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Earthquake Shakes Yellowstone But No Volcano Threat Looms, Scientists Say
Yellowstone Magma Pocket
March 31st, 2014
An earthquake of magnitude 4.8 shook Yellowstone National Park early Sunday (March 30). The tremor was the largest to hit the famed reserve in 34 years, but that doesn't mean Yellowstone's sleeping supervolcano is getting ready to spew, or even belch.
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Guts of Galapagos Volcano Revealed in 3D Images
March 6th, 2014
New 3D images from beneath a volcano in the Galapagos Islands show how these volcanoes differ from those in Hawaii.
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Crater Creator Uses Explosions to Find the Secrets of Volcanoes (Op-Ed)
explosive eruption of Sarychev Volcano
April 16th, 2014
You can learn a lot about volcanoes by studying explosions. The more we can learn about their explosive behaviour, the more chance we have of saving lives when they suddenly erupt.
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Baby Volcanic Island Eats Its Older Neighbor
April 4th, 2014
As a seafloor volcano continues to erupt in a remote part of the Pacific Ocean, a newborn island has swallowed its neighbor whole, images from space show.
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Volcanoes Guard Ice Age Secrets
Tolbachik eruption
March 7th, 2014
Geoscientists are pioneering a new way to make sense of past ice ages — with volcanoes that erupted through ancient ice sheets.
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