Showing 20 articles starting at article 561
Categories: Ecology: General, Geoscience: Earthquakes
Published Major 2020 Alaska quake triggered neighboring 2021 temblor
(via sciencedaily.com) A study of two powerful earthquakes in adjacent areas off the Alaska Peninsula in 2020 and 2021 shows a connection between the two. It also suggests they may be a part of an 80-year rupture cascade along the fault.
Published Space-based system using GPS satellites could warn of incoming tsunamis
(via sciencedaily.com) A new method for detecting tsunamis using existing GPS satellites orbiting Earth could serve as an effective warning system for countries worldwide, according to a new study.
Published Volcanoes at fault if the Earth slips
(via sciencedaily.com) A new study has attributed the root cause of the 2016 Kumamoto earthquakes to specific geological damage. A relatively large dip-slip displacement was discovered at the site. The Futagawa strike-slip fault is a vertical break in the ground tracing a line southwest originating from Mount Aso.
Published Earliest geochemical evidence of plate tectonics found in 3.8-billion-year-old crystal
(via sciencedaily.com) Original source Plate tectonics may be unique to Earth and may be an essential characteristic of habitable planets. Estimates for its onset range from over 4 billion years ago to just 800 million years ago. A new study reports evidence of a transition in multiple locations around the world, 3.8-3.6 billion years ago, from stable 'protocrust' to pressures and processes that look a lot like modern subduction, suggesting a time when plates first got moving.
Published Neural network model helps predict site-specific impacts of earthquakes
(via sciencedaily.com) Original source In disaster mitigation planning for future large earthquakes, seismic ground motion predictions are a crucial part of early warning systems. The way the ground moves depends on how the soil layers amplify the seismic waves (described in a mathematical site 'amplification factor'). However, geophysical explorations to understand soil conditions are costly, limiting characterization of site amplification factors to date. Using data on microtremors in Japan, a neural network model can estimate site-specific responses to earthquakes based on subsurface soil conditions.
Published A swarm of 85,000 earthquakes at the Antarctic Orca submarine volcano
(via sciencedaily.com) In a remote area, a mix of geophysical methods identifies magma transfer below the seafloor as the cause.