Mars displays fascinating geology everywhere you look—and nowhere is this more true than in the fractured, wrinkled ground seen in this image from ESA's Mars Express.
Planetary Sciences
Jan 31, 2023
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43
A team of researchers at Université de Lorraine in France, working with a colleague from Brock University in Canada, and one each from Université Clermont Auvergne and Université Lyon, both in France, has found evidence ...
Creating geological maps of planetary surfaces such as those on Mars is a complex process. From data collection and analysis to publication in different formats, the production of maps is based on a time-consuming, multi-step ...
Planetary Sciences
Jan 10, 2023
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53
U.S. scientists declared Tuesday that two active Hawaii volcanoes—one where lava destroyed hundreds of homes in 2018 and another where lava recently stalled before reaching a crucial Big Island highway—have stopped erupting.
Environment
Dec 13, 2022
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The eruption of the Mauna Loa volcano on Hawaii's Big Island continues to ease, scientists said Sunday, reinforcing an earlier pronouncement that the mountain's first flare-up in nearly 40 years might soon end.
Environment
Dec 12, 2022
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In a dark auditorium in Reykjavik, bubbling orange lava flows down a slide to within inches of awe-struck visitors.
Environment
Dec 9, 2022
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103
Lava from the world's largest volcano is no longer an imminent threat to the main highway across the Big Island of Hawaii, scientists said Thursday, a development that was a welcome reprieve for motorists who depend on the ...
Environment
Dec 8, 2022
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17
About a week-and-a-half since the world's largest volcano began erupting, Hawaii officials continue to brace for slow-moving lava to intersect with a crucial Big Island road, even though scientists are not sure when or even ...
Environment
Dec 8, 2022
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10
If human beings want to survive on the other planets for a long time, they must first find or set up a safe, stable, and long-term shelter. Lunar lava tubes are geological structures on the moon discovered in recent years. ...
Space Exploration
Dec 7, 2022
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8
Improved weather conditions Monday allowed rescuers to resume evacuation efforts and a search for possible victims after the highest volcano on Indonesia's most densely populated island erupted, triggered by monsoon rains.
Environment
Dec 5, 2022
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3
Lava is molten rock expelled by a volcano during eruption. When first expelled from a volcanic vent, it is a liquid at temperatures from 700 °C to 1,200 °C (1,300 °F to 2,200 °F). Although lava is quite viscous, with about 100,000 times the viscosity of water, it can flow great distances before cooling and solidifying, because of both its thixotropic and shear thinning properties.
A lava flow is a moving outpouring of lava, which is created during a non-explosive effusive eruption. When it has stopped moving, lava solidifies to form igneous rock. The term lava flow is commonly shortened to lava. Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra, rather than lava flows. The word "lava" comes from Italian, and is probably derived from the Latin word labes which means a fall or slide. The first use in connection with extruded magma (molten rock below the Earth's surface) was apparently in a short account written by Francesco Serao on the eruption of Vesuvius between May 14 and June 4, 1737. Serao described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of the volcano following heavy rain.
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