The Russian Pacific Fleet’s ballistic missile submarine Generalissimo Suvorov fired a Bulava intercontinental ballistic missile from beneath the Sea of Okhotsk on Oct. 28, sending it across the country to the Chizha test range in the Arkhangelsk region, the Russian Defense Ministry said. The ministry said the launch was carried out from a submerged position […]It may be a cliché, but my kids really do start asking if we're there yet about ten minutes into every road trip. One of the best ways to keep them quiet is to let them watch one of their favorite shows or movies on a tablet. Netflix has some great options that keep my kids entertained for hours.
In most cases, hotspot-driven volcanism is relatively sedate, with lava flowing down mountainsides slowly enough that people can walk out of its way. But in a number of locations—Mount Etna, Hawaii, Iceland—lava gets expelled in dramatic fountains that can reach several hundred meters in height.
Right now, we're not sure what powers them. However, thanks to a recent set of eruptions at the Kilauea volcano, we have some of the best documentation yet of erupting lava fountains. In a recent edition of Science, researchers from the US Geological Survey describe what we've seen and compare it with what we might expect based on our best ideas about what powers these fountains of molten rock.
With three active volcanic regions that engage in fountaining, there has been a steady flow of dramatic videos of red-hot molten rock spouting from the Earth. But Kilauea has had only three fountaining episodes since 1823, even though it's the youngest and most active volcano in Hawaii. That activity has led to intensive study, and we have a good idea of the volcano's structure. Previous work has identified a couple of lava residues within a few kilometers of the surface, and the volcano had 35 separate data-gathering stations set up on Kilauea, including "seismic, infrasound, geodetic, gas, and visual and thermal cameras."
© Mike Lyvers
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