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Volcano, Antarctica, seismic analysis, seismic imaging

Volcano Discovered Smoldering Under a Kilometer of Ice in West Antarctica

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A temporary seismic array in Marie Byrd Land in West Antarctica recorded two bursts of activity in 2010 and 2011. Careful analysis of the events shows they originate from a subglacial volcano at the leading end of a volcanic mountain chain. The volcano is unlikely to erupt through the kilometer of ice that covers it but it will melt enough ice to change the way the ice in its vicinity flows.

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Volcanoes, Volcanology, Geology, Earth Science, Oceans, Planetary Science

Water and Lava, but — Curiously — No Explosion

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A study finds that hollow, land-based lava pillars in Iceland likely formed in a surprising reaction where lava met water without an explosion. Such formations are common deep under the ocean, but have not been described on land, the lead researcher says.

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Volcanoes, Magma, Eruption, Yellowstone

Molten Magma Can Survive in Upper Crust for Hundreds of Millennia

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Reservoirs of silica-rich magma – the kind that causes the most explosive volcanic eruptions – can persist in Earth's upper crust for hundreds of thousands of years without triggering an eruption, according to new University of Washington research.

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Mount St. Helens, Volcanoes, Magma, Earthquakes, Cascade Range

Scientists Want a Detailed Picture of Mount St. Helens' Plumbing

Earth scientists are laying plans for a two-year study covering a broad area of southwestern Washington state to develop a better understanding of how Mount St. Helens gets its supply of volcanic magma.

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Volcano, Redoubt, Eruption, Tremor, Magma, Earthquake

Some Volcanoes 'Scream' at Ever-Higher Pitches Until They Blow Their Tops

Swarms of small earthquakes can precede a volcanic eruption, sometimes resulting in "harmonic tremor" resembling sound from some musical instruments. A new analysis shows tremor during a 2009 sequence at Alaska's Redoubt Volcano glided to substantially higher frequencies, then stopped abruptly just before six of the eruptions.

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Volcano, Volcanic Eruptions, mud flows, popocatepetl, Popo

Volcanologist Can Discuss ‘Popo’, the Ash-Spewing Volcano That Has Towns Near Mexico City on Alert

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Scripps Scientists Image Deep Magma beneath Pacific Seafloor Volcano

Since the plate tectonics revolution of the 1960s, scientists have known that new seafloor is created throughout the major ocean basins at linear chains of volcanoes known as mid-ocean ridges. But where exactly does the erupted magma come from?

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Scripps Scientists Discover ‘Lubricant’ for Earth’s Tectonic Plates

Scientists at Scripps Institution of Oceanography at UC San Diego have found a layer of liquefied molten rock in Earth’s mantle that may be acting as a lubricant for the sliding motions of the planet’s massive tectonic plates. The discovery may carry far-reaching implications, from solving basic geological functions of the planet to a better understanding of volcanism and earthquakes.

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Earth, core, Mantle, Crust, piles, thromochemical piles, deep mantle piles, large low shear velocity provinces, LLSVPs, ultra low velocity zones, ULVZs, Plate Tectonics, core-mantle boundary, Earthquakes, Seismology, Geophysics

The Deep Roots of Catastrophe

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A University of Utah seismologist analyzed seismic waves that bombarded Earth’s core, and believes he got a look at the earliest roots of Earth’s most cataclysmic kind of volcanic eruption. But don’t worry. He says it won’t happen for perhaps 200 million years.

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seismic activity, Tectonics, Volcanic Eruptions, Tsunami, Pacific Rim, Kamchatka, Russian Far East

Russian Far East Holds Seismic Hazards That Could Threaten Pacific Basin

Research shows that the Kamchatka Peninsula and Kuril Islands, long shrouded in secrecy by the Soviet government, are a seismic and volcanic hotbed with a potential to trigger tsunamis that pose a risk to the rest of the Pacific Basin.







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