Showing 20 articles starting at article 341
Categories: Geoscience: Earthquakes, Geoscience: Geology
Published Hunga volcano eruption provides an explosion of data
(via sciencedaily.com) The massive Jan. 15, 2022, eruption of the Hunga submarine volcano in the South Pacific Ocean created a variety of atmospheric wave types, including booms heard 6,200 miles away in Alaska. It also created an atmospheric pulse that caused an unusual tsunami-like disturbance that arrived at Pacific shores sooner than the actual tsunami.
Published New research could provide earlier warning of tsunamis
(via sciencedaily.com) A new method of detecting mega earthquakes, which picks up on the gravity waves they generate by using deep-learning models, can estimate earthquake magnitude in real time and provide earlier warning of tsunamis.
Published Lake Erie quakes triggered by shifting water levels? Study finds no smoking gun, urges further research
(via sciencedaily.com) In June 2019, a magnitude 4.0 earthquake occurred beneath Lake Erie just off the shoreline of Ohio, about 20 miles northeast of Cleveland.
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.