Taxonomy term

magma

Reading the ridges: Are climate and the seafloor connected?

New research suggests that midocean ridge volcanoes respond to variations in sea level, potentially leaving topographic records of past glaciations in the form of abyssal hills. But could those volcanoes also influence the climate cycles that drive sea-level changes?

25 Apr 2016

How supervolcanoes are set off

If a supervolcano were to erupt today, its impacts could be catastrophic. Fortunately, no such eruption has occurred during human history. The lack of eyewitness accounts, however, makes it difficult for scientists to understand how supervolcanoes evolve and erupt. Based on a recent modeling, researchers have offered a new hypothesis for how supervolcano eruptions might be triggered by external, rather than internal, forces.

01 Mar 2016

Magma pancakes underlie Toba supervolcano

Giant eruptions from so-called supervolcanoes eject tremendous volumes of lava and ash, but details about the source of all that volcanic material have been unclear. Now, a new study has found that magma reservoirs intrude into the crust under volcanoes over millions of years in the form of multiple horizontally oriented chambers stacked on top of each other, like a stack of pancakes.

 
11 Mar 2015

Magma mobilizes quickly beneath Mount Hood

In a recent study in Nature, researchers found that magma beneath Oregon’s Mount Hood spends minimal time in an eruptible state. Instead, magma remobilization and eruption occur within a short time frame. What this means for volcanic hazards in the Pacific Northwest has yet to be determined. 

10 Jun 2014

AGU: Aloha, magma! Geothermal engineers drill into surprising lava

SAN FRANCISCO — While drilling deep into Earth, geothermal engineers struck geological gold, opening a never-before-seen window into a classic geologic process: how basalt magma becomes granite. The find, they announced at the annual meeting of the American Geophysical Union on Tuesday, could amount to the first magma observatory on Earth.

16 Dec 2008

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