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Categories: Geoscience: Earthquakes

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Environmental: General Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Environmental Issues Geoscience: Geology
Published

Heavy snowfall and rain may contribute to some earthquakes      (via sciencedaily.com)     Original source 

Episodes of heavy snowfall and rain likely contributed to a swarm of earthquakes over the past several years in northern Japan, researchers find. Their study shows climate conditions could initiate some earthquakes.

Geoscience: Earthquakes Geoscience: Environmental Issues
Published

Pore pressure diffusion led to microseismicity at Illinois basin carbon sequestration site      (via sciencedaily.com)     Original source 

Pore pressure diffusion generated by carbon dioxide injected underground at a carbon storage site in the Illinois Basin is the likely cause of hundreds of microearthquakes that took place at the site between 2011 and 2012, according to a new analysis.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geochemistry Geoscience: Geography Geoscience: Geology
Published

Researchers show that slow-moving earthquakes are controlled by rock permeability      (via sciencedaily.com)     Original source 

A research group explores how the makeup of rocks, specifically their permeability -- or how easily fluids can flow through them -- affects the frequency and intensity of slow slip events. Slow slips' role in the earthquake cycle may help lead to a better model to predict when earthquakes happen.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geography
Published

Do earthquake hazard maps predict higher shaking than actually occurred?      (via sciencedaily.com)     Original source 

A research team studied earthquake hazard maps from five countries and found that all the maps seemed to overpredict the historically observed earthquake shaking intensities. In analyzing the possible causes, the researchers discovered the issue was with the conversion equations used in comparing the maps predicting future quakes with actual shaking data, rather than systemic problems with the hazard modeling itself.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geology
Published

Scientists trigger mini-earthquakes in the lab      (via sciencedaily.com)     Original source 

Earthquakes and landslides are famously difficult to predict and prepare for. By studying a miniature version of the ground in the lab, scientists have demonstrated how these events can be triggered by a small external shock wave. Bring a flotation device: it involves the ground briefly turning into a liquid!

Chemistry: Thermodynamics Environmental: General Geoscience: Earth Science Geoscience: Earthquakes
Published

Rock permeability, microquakes link may be a boon for geothermal energy      (via sciencedaily.com)     Original source 

Using machine learning, researchers have tied low-magnitude microearthquakes to the permeability of subsurface rocks beneath the Earth, a discovery that could have implications for improving geothermal energy transfer.

Geoscience: Earth Science Geoscience: Earthquakes
Published

Mathematical innovations enable advances in seismic activity detection      (via sciencedaily.com)     Original source 

Scientists successfully addressed mathematical challenges in conventional Spectral Matrix analysis, used to analyze three-component seismic signals, by introducing time-delay components. The new technique enables the characterization of various polarized waves and the detection of seismic events that have previously gone unnoticed by conventional methods. These findings pave the way for improving a variety of applications, including earthquake detection.

Geoscience: Earthquakes Offbeat: Earth and Climate Offbeat: General Physics: Acoustics and Ultrasound
Published

What kinds of seismic signals did Swifties send at LA concert?      (via sciencedaily.com)     Original source 

Seattle may have experienced its own Swift Quake last July, but at an August 2023 concert Taylor Swift's fans in Los Angeles gave scientists a lot of shaking to ponder. After some debate, a research team concluded that it was likely the dancing and jumping motions of the audience at SoFi Stadium -- not the musical beats or reverberations of the sound system -- that generated the concert's distinct harmonic tremors.

Anthropology: General Archaeology: General Environmental: Water Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Environmental Issues Geoscience: Geology Geoscience: Oceanography Geoscience: Volcanoes Paleontology: Climate
Published

Biggest Holocene volcano eruption found by seabed survey      (via sciencedaily.com)     Original source 

A detailed survey of the volcanic underwater deposits around the Kikai caldera in Japan clarified the deposition mechanisms as well as the event's magnitude. As a result, the research team found that the event 7,300 years ago was the largest volcanic eruption in the Holocene by far.

Environmental: Water Geoscience: Earthquakes Geoscience: Geography Geoscience: Landslides
Published

New detection method aims to warn of landslide tsunamis      (via sciencedaily.com)     Original source 

Researchers have devised a way to remotely detect large landslides within minutes of occurrence and to quickly determine whether they are close to open water and present a tsunami hazard.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geography
Published

Earthquake fatality measure offers new way to estimate impact on countries      (via sciencedaily.com)     Original source 

A new measure that compares earthquake-related fatalities to a country's population size concludes that Ecuador, Lebanon, Haiti, Turkmenistan, Iran and Portugal have experienced the greatest impact from fatalities in the past five centuries.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geochemistry Geoscience: Geography Geoscience: Geology Geoscience: Oceanography
Published

Early-stage subduction invasion      (via sciencedaily.com)     Original source 

Our planet's lithosphere is broken into several tectonic plates. Their configuration is ever-shifting, as supercontinents are assembled and broken up, and oceans form, grow, and then start to close in what is known as the Wilson cycle.

Environmental: Water Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Environmental Issues Geoscience: Geography Geoscience: Geology
Published

Ancient rocks improve understanding of tectonic activity between earthquakes      (via sciencedaily.com)     Original source 

Rocks once buried deep in ancient subduction zones -- where tectonic plates collide -- could help scientists make better predictions of how these zones behave during the years between major earthquakes, according to a research team.

Energy: Nuclear Environmental: General Geoscience: Earthquakes
Published

New method to more accurately spot underground nuclear tests      (via sciencedaily.com)     Original source 

A more accurate way of identifying underground nuclear tests, including those conducted in secret, has been developed.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geography Geoscience: Geology
Published

A new origin story for deadly Seattle fault      (via sciencedaily.com)     Original source 

The Seattle fault zone is a network of shallow faults slicing through the lowlands of Puget Sound, threatening to create damaging earthquakes for the more than four million people who live there. A new origin story, proposed in a new study, could explain the fault system's earliest history and help scientists improve hazard modeling for the densely populated region.

Environmental: General Geoscience: Earthquakes Geoscience: Environmental Issues Geoscience: Geology
Published

Key factors in human-made earthquakes      (via sciencedaily.com)     Original source 

Researchers report that the roughness of pre-existing faults and associated stress heterogeneity in geological reservoirs play a key role for causing human-made earthquakes, so-called runaway events. The study combines novel fluid injection experiments under acoustic monitoring performed in GFZ's geomechanical laboratory with numerical modelling results.

Geoscience: Earthquakes
Published

New map shows where damaging earthquakes are most likely to occur in US      (via sciencedaily.com)     Original source 

Scientists recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.

Environmental: General Environmental: Water Geoscience: Earthquakes Geoscience: Geography
Published

Is natural spa water a fossil of water? Uncover the real ultra-deep water cycles      (via sciencedaily.com)     Original source 

Researchers have made a groundbreaking discovery regarding the origins of non-meteoric water in natural spa waters located in central Japan. Based on numerical modeling, their results suggest that this water has been confined within the lithosphere for an extensive period of 1.5-5 million years. They identified three primary sources for this ancient water: the Philippine Sea Plate, the Pacific Plate, and ancient seafloor sediments, particularly in the Niigata and southwest Gunma regions.

Environmental: General Geoscience: Earth Science Geoscience: Earthquakes
Published

Seismic and infrasonic signals used to characterize Nord Stream pipeline events      (via sciencedaily.com)     Original source 

A new study provides further evidence that the Nord Stream seismic signals came from a complex source. The signals lasted longer than would be expected from a single explosive source, the researchers say, and were more like the signals detected from an underwater volcano or a pipeline venting gas.

Geoscience: Earth Science Geoscience: Earthquakes Geoscience: Geography Paleontology: General
Published

Morocco earthquake had unusual deep slip, according to new modeling      (via sciencedaily.com)     Original source 

In their rapid characterization of the magnitude 6.8 Al Haouz earthquake in Morocco, researchers suggest that the earthquake ruptured roughly 25 kilometers deep beneath the surface.