Lahar detection system upgraded for Mount Rainier
In the shadow of Washington State's Mount Rainier, about 90,000 people live in the path of a potential large lahar—a destructive, fluid and fast-moving debris flow associated with volcanic slopes.
In the shadow of Washington State's Mount Rainier, about 90,000 people live in the path of a potential large lahar—a destructive, fluid and fast-moving debris flow associated with volcanic slopes.
Earth Sciences
May 3, 2024
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Two NASA pathfinding missions were recently deployed into low-Earth orbit, where they are demonstrating novel technologies for observing atmospheric gases, measuring freshwater, and even detecting signs of potential volcanic ...
Planetary Sciences
May 2, 2024
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How often do mountains collapse, volcanoes erupt or ice sheets melt?
Earth Sciences
May 2, 2024
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A new statistical analysis of the interaction between El Niño and rising global temperatures due to climate change concludes that the approaching summer in the tropics has nearly a 7 in 10 chance of breaking records for ...
Earth Sciences
Apr 22, 2024
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Superradiant atoms can help us measure time more precisely than ever. In a recent study, researchers from the University of Copenhagen present a new method for measuring the time interval, the second, mitigating some of the ...
General Physics
Apr 22, 2024
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More than 2,100 people living near an erupting volcano on Indonesia's Sulawesi Island were evacuated Friday due to the dangers of spreading ash, falling rocks, hot volcanic clouds and the possibility of a tsunami.
Environment
Apr 20, 2024
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A team of geologists and planetary scientists from the California Institute of Technology, the University of California Santa Cruz, New York University, and NASA Goddard Space Flight Center reports evidence that Io's volcanic ...
A remote Indonesian volcano sent a tower of ash spewing into the sky Friday, after nearly half a dozen eruptions earlier this week forced thousands to evacuate when molten rocks rained down on their villages.
Environment
Apr 19, 2024
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Deadly heat in the Southwest. Hot-tub temperatures in the Atlantic Ocean. Sweltering conditions in Europe, Asia and South America.
Earth Sciences
Apr 1, 2024
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A recent study published in the journal Science Bulletin was led by Dr. Shugui Hou (Nanjing University and Shanghai Jiao Tong University) and Dr. Hongxi Pang (Nanjing University). Shugui Hou drilled an ice core with a length ...
Earth Sciences
Mar 29, 2024
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A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time. The word volcano is derived from the name of Vulcano island off Sicily. In turn, it was named after Vulcan, the Roman god of fire.
Volcanoes are generally found where tectonic plates are diverging or converging. A mid-oceanic ridge, for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together. By contrast, volcanoes are usually not created where two tectonic plates slide past one another. Volcanoes can also form where there is stretching and thinning of the Earth's crust (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley, the Wells Gray-Clearwater volcanic field and the Rio Grande Rift in North America and the European Rhine Graben with its Eifel volcanoes.
Volcanoes can be caused by mantle plumes. These so-called hotspots, for example at Hawaii, can occur far from plate boundaries. Hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.
This text uses material from Wikipedia, licensed under CC BY-SA