The Colorado River's initial trip to the ocean didn't come easy, but its story has emerged from layers of sediment preserved within tectonically active stretches of the waterway's lower reaches. University of Oregon researchers theorize that the river's route off the Colorado Plateau was influenced by tectonic deformation and changing sea levels that produced a series of stops and starts between roughly 6.3 and 4.8 million years ago.
Reservoirs of oxygen-rich iron between the Earth's core and mantle could have played a major role in Earth's history, including the breakup of supercontinents, drastic changes in Earth's atmospheric makeup, and the creation of life, according to recent work from an international research team published in National Science Review.
A multi-disciplinary team of researchers from LMU and TUM in Munich simulated the largest, longest multiphysics earthquake simulation to date at the Leibniz Supercomputing Centre. Its work is up for best paper at SC17.
The concentration of carbon dioxide (CO2) in the atmosphere determines whether the Earth is in greenhouse or ice age state. Before humans began to have an impact on the amount of CO2 in the air, it depended solely on the interplay of geological and biological processes, the global carbon cycle. This study shows that the break-up of continents -- also known as rifting -- contributed significantly to higher CO2 concentrations in the atmosphere.
Using hundreds of satellite radar images the team, working with Geomatic Ventures Limited (GVL), an innovative University spin-out company, created a complete map of mainland Scotland.
The Cyclone ionosonde (creatied by Dr. Akchurin, Head of the Near Space Studies Lab of SAU AstroChallenge) can detect earthquakes at distances as big as 15,000 kilometers. The paper also states that earthquake signatures for mid-latitude KFU ionosonde can be up to 3 times more prominent than on a low-latitude ionosonde in Japan.
An international research team led by Kyushu University (Japan) identified that subduction-related friction and pre-existing fault structures in the Eurasian/Philippine Sea plate boundary significantly influences earthquake location and rupturing behavior. The degree of friction decreases towards the Nankai Trough, resulting in non-uniform stress accumulation that has influenced the location of historic and modern earthquakes in the region.
Researchers from the US Geological Survey and the Southern California Earthquake Center used the Stampede1 and 2 supercomputers at the Texas Advanced Computing Center to complete one of the world's largest earthquake simulation models: The Uniform California Earthquake Rupture Forecast (UCERF3). The simulations showed that in the week following a magnitude 7.0 earthquake, the likelihood of another magnitude 7.0 quake in California would be up to 300 times greater than the week before.
Giant lateral collapses are huge landslides occurring at the flanks of a volcano. Such collapses are rather common events during the evolution of a large volcanic edifice, often with dramatic consequences such as tsunami and volcano explosions. These catastrophic events interact with the magmatic activity of the volcano, as a new research by scientists of GFZ German Research Centre for Geosciences in Nature Communications suggests.
When the Chicxulub asteroid slammed into Earth about 66 million years ago, it obliterated 80 percent of Earth's species, blasted out a crater 200 kilometers across, and signaled an abrupt end to the Cretaceous Period. The impact, its catastrophic effects, and its aftermath have engrossed scientists and the public alike since it was first discovered.