To better understand subsurface processes associated with earthquakes and eruptions of Mount Aso, Kyushu University researchers investigated a very long period (VLP) seismicity dataset collected over two years. A new technique was developed to locate VLP events, and two clusters of such events were detected. Changes in the locations of VLP events were closely associated with earthquake and eruption occurrences. This method advances understanding of seismic and volcanic processes and could contribute to disaster mitigation.
Researchers have explained mysterious slow-moving earthquakes known as slow slip events with the help of computer simulations. The answer, they learned, is in rocks' pores.
Scientists have found that increasing oxygen levels are linked to the rise of North American dinosaurs around 215 million years ago. A new technique for measuring oxygen levels in ancient rocks shows that oxygen levels in North American rocks leaped by nearly a third in just a couple of million years, possibly setting the scene for a dinosaur expansion into the tropics of North America and elsewhere. From the Goldschmidt Geochemistry conference, Barcelona.
Computer models show why eruptive magma chambers tend to reside between six and 10 kilometers underground.
River diversions have not created or maintained land, but resulted in more land loss, according to a new paper in the peer-reviewed science journal Restoration Ecology.
Phase H is a hydrous mineral that is considered to be an important carrier of water into deep Earth. We determined the dissociation condition of phase H by a theoretical calculation based on quantum mechanics. Phase H decomposes at approximately 60 GPa at 1000 K. This indicates that the transportation of water by phase H may be terminated at a depth of approximately 1,500 km in the middle of the lower mantle.
Analyses show that gases found in microscopic inclusions in diamonds come from a stable subterranean reservoir at least as old as the Moon, hidden more than 410 km below sea level in the Earth's mantle.
Energy use in buildings -- from heating and cooling your home to keeping the lights on in the office -- is responsible for over one-third of all carbon dioxide (CO2) emissions in the United States. Slashing building CO2 emissions 80% by 2050 would therefore contribute significantly to combatting climate change. A new model developed by researchers at two US national laboratories appears Aug. 15 in the journal Joule.
Researchers are paving the way toward greater safety for coastal residents and infrastructure by developing a better means of modeling the destructive force of tsunami waves.
An international team of subsurface explorers from the University of Adelaide in Australia and the University of Aberdeen in Scotland have uncovered a previously undescribed 'Jurassic World' of around 100 ancient volcanoes buried deep within the Cooper-Eromanga Basins of central Australia.