A team of researchers from Japan found that water enhances energy dispersion and reduces elastic moduli in rocks, leading to increased seismic wave attenuation. The study suggests the oceanic asthenosphere must contain water, explaining sharp velocity drops and near-constant attenuation observed at the LAB.
SourceOkayama University·JournalProceedings of the National Academy of Sciences·TypeExperimental study·DateSep 26, 2023
A new study published in Diabetologia reveals that morning and afternoon physical activity are associated with a lower risk of developing type 2 diabetes. The researchers found that each 1-unit increase in MET-hour physical activity was linked to a 10% reduction in risk, with the association being most pronounced in the morning and aft...
The 1923 Kantō earthquake sparked devastating fires that killed 90% of Tokyo's population, making it one of the deadliest natural disasters in history. The study highlights the importance of fire prevention and response as part of earthquake mitigation plans for regions with strong seismic shaking and wood-framed buildings.
SourceSeismological Society of America·JournalBulletin of the Seismological Society of America·TypeObservational study·DateSep 12, 2023
Scientists used distributed acoustic sensing (DAS) on a 37.4-kilometer-long fiber optic cable to track sea ice formation and retreat with fine spatiotemporal detail, revealing rapid changes up to 10 kilometers in less than a day. The technique offers improved resolution compared to satellite images.
SourceSeismological Society of America·JournalThe Seismic Record·TypeObservational study·DateAug 9, 2023
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A team of scientists at Caltech used a section of fiber optic cable to measure the intricate details of a magnitude 6 earthquake, pinpointing four individual asperities that led to the rupture. The study demonstrates the potential of distributed acoustic sensing technology to improve our understanding of earthquake physics.
SourceCalifornia Institute of Technology·JournalNature·DateAug 2, 2023
A new study using nearly a century of seismic data suggests that the average heights of winter waves along California's coast have increased as climate change has heated up the planet. This could amplify the effects of sea-level rise, leading to significant coastal impacts and erosion.
SourceUniversity of California - San Diego·JournalJournal of Geophysical Research Oceans·TypeMeta-analysis·DateAug 1, 2023
Researchers from the University of Tokyo and Stanford University analyze slow and fast earthquakes, showing that their magnitudes vary with time. The study confirms the scaling law for slow earthquakes, which defines the relationship between magnitude and duration, and reveals physical processes governing events.
SourceSchool of Science, The University of Tokyo·JournalProceedings of the National Academy of Sciences·TypeData/statistical analysis·DateJul 31, 2023
Decades of seismic data reveal that central Utah's earthquake 'swarms' are more common than other types of sequences, with 80% of sequences being swarms. The study also found that these swarms exhibit heterogeneous behavior across different locations in the region.
SourceUniversity of Utah·JournalGeochemistry Geophysics Geosystems·TypeData/statistical analysis·DateJul 24, 2023
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Celestron NexStar 8SE Computerized Telescope combines portable Schmidt-Cassegrain optics with GoTo pointing for outreach nights and field campaigns.
The study reveals that LLSVPs exhibit higher densities at the bottom of the lower mantle, while displaying lower densities above a depth of approximately 2700 kilometers. Elevated temperatures and enriched concentrations of iron and bridgmanite are also detected.
SourceUniversity of Science and Technology of China·JournalProceedings of the National Academy of Sciences·DateJul 15, 2023
The Great Sitkin Volcano in Alaska has two magma chambers that drive its long-lived and explosive eruptions. Scientists have discovered a six-stage eruption cycle, with the interaction between the chambers contributing to lava effusion. This study helps predict volcanic eruptions and assess hazards.
SourcePurdue University·JournalGeophysical Research Letters·DateJun 19, 2023
A study examined the seismic performance of 12 hospitals in Turkey's southcentral region, finding that base-isolated structures performed better than fixed-base ones during the 2023 earthquakes. The report provides valuable insights for policymakers and engineers to enhance hospital resilience and disaster response strategies.
SourceKeAi Communications Co., Ltd.·JournalEarthquake Research Advances·TypeCase study·DateJun 18, 2023
Researchers have found a surprising correlation between global seismic activity and changes in cosmic radiation intensity, potentially aiding in earthquake prediction. The periodicity of this phenomenon has been identified as every 10-11 years, but its exact cause remains unknown.
SourceThe Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences·JournalJournal of Atmospheric and Solar-Terrestrial Physics·DateJun 15, 2023
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SAMSUNG T9 Portable SSD 2TB transfers large imagery and model outputs quickly between field laptops, lab workstations, and secure archives.
A research team used a new seismic inversion algorithm to study lithospheric delamination and its controls on the Mesozoic Magmatic Province in South China. High-velocity anomalies were found at depths of less than 90 kilometers, suggesting lithosphere blocks began to delaminate at 180-170Ma.
SourceUniversity of Science and Technology of China·JournalNature Communications·DateJun 9, 2023
Researchers used a powerful supercomputer to analyze the 2019 Ridgecrest earthquakes, which showed how faults can interact across segments and cause unexpected interactions. The study's findings improve seismic hazard assessment and preparedness for complex earthquake systems.
SourceUniversity of California - San Diego·JournalNature·TypeComputational simulation/modeling·DateMay 24, 2023
Increasing physical activity, particularly daily 20-minute walks, can improve cardiovascular health and reduce disparities in heart health. Despite this, only one in four American adults meet the recommended physical activity levels, with certain groups facing additional barriers to accessibility.
SourceAmerican Heart Association·JournalCirculation·DateMay 24, 2023
Researchers determined the Martian crust's global structure using seismic data from a massive marsquake. The crust averages 42-56 kilometers in thickness, with variations between the northern and southern hemispheres.
SourceETH Zurich·JournalGeophysical Research Letters·TypeObservational study·DateMay 6, 2023
The study found that the Tanlu Fault Zone underwent episodic dextral strike-slip movement in late Cenozoic, with the Banquan Basin serving as a record of this process. The movement was linked to the evolution of the pull-apart basin and surrounding faults.
SourceScience China Press·JournalScience China Earth Sciences·DateApr 27, 2023
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Researchers at the University of Bristol used NASA's InSight lander data to detect seismic waves traveling into Mars' core, revealing a denser and smaller core comprising iron and numerous other elements. The study found that the core's composition is distinct from Earth's, with a high fraction of light elements alloyed with iron.
SourceUniversity of Bristol·JournalProceedings of the National Academy of Sciences·DateApr 24, 2023
Researchers used NASA InSight data to directly measure Mars' core properties, finding a completely liquid iron-alloy core with high percentages of sulfur and oxygen. This discovery provides new insights into Martian formation and geological differences between Earth and Mars, potentially impacting planetary habitability.
SourceUniversity of Maryland·JournalProceedings of the National Academy of Sciences·TypeData/statistical analysis·DateApr 24, 2023
A recent study identified over 182,000 small seismic events in South Korea, with 135,000 related to mining explosions. The researchers used machine learning techniques to analyze data from 421 seismic stations and found distinct patterns that allowed them to distinguish between microseismic events and earthquakes.
SourceSeismological Society of America·TypeObservational study·DateApr 20, 2023
Researchers confirm that water causes incipient melting, leading to reduced S-wave velocity and enhanced electrical conductivity. The presence of low-velocity zones in continental China is attributed to basal hydration weakening the lithosphere, converting it into asthenosphere.
SourceScience China Press·JournalScience Bulletin·DateApr 18, 2023
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Researchers have developed a way to quickly detect and assess glacial valley landslides in coastal Alaska, which can trigger dangerous local tsunamis. They use seismic data to pinpoint landslide events and estimate their volume, aiming to develop an operational detection tool for tsunami centers.
SourceSeismological Society of America·TypeObservational study·DateApr 10, 2023
A systematic review of literature on physical activity found that the built environment and social factors have a significant influence on physical activity levels. The study identified gaps in research, particularly in understanding how social and built environments interact across communities and affect health disparities. Researcher...
SourceTexas A&M University·JournalJournal of Physical Activity and Health·DateApr 5, 2023
Seismic arrays in California's Long Beach and Seal Beach detected over 1,200 shallow earthquakes, showing the Newport-Inglewood fault splays widely at shallow depths. This suggests that a rupture to propagate to the surface may have multiple paths, implications for earthquake hazard planning.
SourceSeismological Society of America·JournalSeismological Research Letters·TypeObservational study·DateApr 5, 2023
Research led by The University of Alabama reveals a dense, yet thin, layer of ancient ocean floor surrounding the Earth's core-mantle boundary. This ultra-low velocity zone is denser than the rest of the deep mantle and may play an important role in heat escape from the core.
SourceUniversity of Alabama in Tuscaloosa·JournalScience Advances·TypeImaging analysis·DateApr 5, 2023
Researchers used machine learning techniques to analyze seven years' worth of seismic data from Axial Seamount, identifying new signals including fin whale calls, tremors, earthquakes, and lava events. This study improves understanding of volcano dynamics and aids in predicting eruptions.
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A recent study published in Nature Communications reveals that Earth's anisotropic inner core structure is driven by the dipole geomagnetic field. The researchers found that hexagonal-close-packed (hcp) Fe-H alloy exhibited both seismic anisotropy and H-ion diffusion anisotropy under high pressure-temperature conditions.
SourceChinese Academy of Sciences Headquarters·JournalNature Communications·DateMar 30, 2023
A study by Revathy Parameswaran and colleagues compared ground motion and magnitude estimates from satellite and seismic records for the 2021 Chignik earthquake. The researchers found that GNSS and strong-motion acceleration seismic data can be used interchangeably or jointly for rapid magnitude or ground motion estimation.
SourceSeismological Society of America·JournalSeismological Research Letters·TypeObservational study·DateMar 7, 2023
Research from Penn State found that self-monitoring physical activity through smartwatches leads to increased motivation and activity levels. Participants who received prompts to report their activity took hundreds more steps in a given day compared to those who didn't receive such prompts.
SourcePenn State·JournalHealth Psychology·DateMar 7, 2023
Researchers have detected a complex variety of seismic tremor signals at Mefite d'Ansanto, a non-volcanic carbon dioxide emission site in southern Italy. The analysis reveals three main types of tremor signals over different frequencies, which may be related to fluid discharge and changes in flow velocities.
SourceSeismological Society of America·JournalBulletin of the Seismological Society of America·TypeExperimental study·DateFeb 27, 2023
Seismologists from ANU have documented evidence of a distinct layer inside the Earth's inner core, known as the innermost inner core, which is a solid metallic ball. This discovery provides a new way to probe the Earth's inner core and its centremost region.
SourceAustralian National University·JournalNature Communications·DateFeb 21, 2023
CalDigit TS4 Thunderbolt 4 Dock
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A new analysis of seismic data recorded after the Tonga eruption has revealed two distinct sequences of events, including quasi-periodic explosions and a massive final event. The study used back-projection techniques to tease out details from teleseismic P waves, shedding light on the volcano's internal dynamics.
SourceHokkaido University·JournalEarth and Planetary Science Letters·TypeData/statistical analysis·DateJan 27, 2023
The study found that seismometers overlying the basin's deepest areas recorded stronger low-frequency amplification, while monitors at shallow edges recorded minimal amplification. Higher frequency amplification was detected in both deeper and shallower areas. This phenomenon is making the ground motion last longer and feel stronger.
SourceUniversity of Alaska Fairbanks·JournalBulletin of the Seismological Society of America·TypeMeta-analysis·DateJan 26, 2023
A Christmas-themed physical activity intervention during Advent showed promise for increasing physical activity and reducing sedentary time among inactive adults. The study, published in the BMJ, found that participants who received a daily email with physical activity ideas reported participating in more moderate-to-vigorous intensity...
SourceBMJ Group·JournalThe BMJ·TypeRandomized controlled/clinical trial·DateDec 19, 2022
The study found that earthquake-accelerated landslides (EALs) can maintain accelerated motion for a long time after the earthquake, causing particularly serious human casualties in seismically active areas. Satellite radar observations detected and investigated EALs in Central Italy, leading to the first ever complete EAL inventory.
SourceNewcastle University·JournalNature Communications·TypeData/statistical analysis·DateNov 30, 2022
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A team of researchers from Cornell University has developed a method to study delayed earthquake triggering in laboratory settings. They found that the speed and strength of 'creep fronts' are sensitive to fault stress levels from previous earthquakes, which could potentially serve as local stress meters for predicting seismic events.
SourceCornell University·JournalNature Communications·DateNov 30, 2022
A new study found that mothers of young children and those with multiple children tend to engage in lower amounts of moderate or vigorous physical activity. However, these groups may still benefit from efforts to boost their opportunities for higher-intensity activity.
Researchers found that Caltech Hall's natural frequencies have increased by 5% in the east-west direction and 2% in the north-south direction over 20 years. This suggests up to 20% variation in the building's stiffness between earthquakes, posing a challenge for seismic structural health monitoring.
SourceSeismological Society of America·JournalThe Seismic Record·TypeObservational study·DateNov 11, 2022
A recent study published in Nature suggests that Mars is still experiencing volcanic activity, with quakes originating from the Cerberus Fossae region indicating a warm source of molten lava. The seismic data also shows darker deposits of dust surrounding the area, suggesting geological evidence of more recent volcanic activity.
SourceETH Zurich·JournalNature Astronomy·TypeObservational study·DateOct 27, 2022
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Creality K1 Max 3D Printer rapidly prototypes brackets, adapters, and fixtures for instruments and classroom demonstrations at large build volume.
Researchers analyze seismic surface waves to determine Martian crust density and structure. The data reveals a uniform crust beneath the impact sites, contradicting earlier findings at the InSight lander.
SourceETH Zurich·JournalScience·TypeObservational study·DateOct 27, 2022
Researchers used seismic data and orbital observations to refine knowledge of Mars' planetary interior. The studies provide new constraints that validate and refine models of the planet's internal structure and dynamics of major impacts.
SourceInstitut de physique du globe de Paris·JournalScience·DateOct 27, 2022
Researchers have discovered that two seismic events detected by NASA's InSight lander were caused by meteor impacts, sending surface waves across the planet. These collisions provide valuable information about Mars' interior structure, with one study finding a denser crust than previously inferred.
SourceAmerican Association for the Advancement of Science (AAAS)·JournalScience·DateOct 27, 2022
A new study using wearable devices found that moderate-to-vigorous physical activity significantly reduces cardiovascular disease risk, even when total physical activity volume is increased. Increasing the proportion of intense physical activity within overall activity levels has an additional substantial benefit.
SourceUniversity Hospitals of Leicester NHS Trust·JournalEuropean Heart Journal·TypeObservational study·DateOct 27, 2022
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Rigol DP832 Triple-Output Bench Power Supply powers sensors, microcontrollers, and test circuits with programmable rails and stable outputs.
Scientists have detected seismic surface waves on Mars for the first time, providing new insights into the planet's crust and structure. The study estimates the average properties of the Martian crust between 3 to 18.6 miles below the surface, revealing faster seismic velocities that suggest compositional differences or reduced porosity.
SourceUniversity of Maryland·JournalScience·TypeComputational simulation/modeling·DateOct 27, 2022
A Finnish study found that retiring individuals experience an increase in sleep time and a corresponding decrease in physical activity. This shift is attributed to the absence of work-related activities and commute time, which are replaced by sedentary behavior.
SourceUniversity of Turku·JournalInternational Journal of Behavioral Nutrition and Physical Activity·TypeData/statistical analysis·DateOct 4, 2022
Researchers developed an ultra-compact seismic source to continuously monitor carbon reservoirs, detecting CO2 leaks and changes that require attention. The Portable Active Seismic Source (PASS) technology can be deployed affordably and has potential applications in monitoring for disasters and imaging subsurface structures.
SourceKyushu University, I2CNER·JournalSeismological Research Letters·DateSep 16, 2022
Seismologists have identified hundreds of thousands of microearthquakes along previously unknown fault structures in Oklahoma and Kansas, allowing them to map and measure earthquake clusters. The study found that nearly a 5% chance that a cluster would host a magnitude 4 or larger earthquake within a year if it reached a certain length...
SourceSeismological Society of America·JournalThe Seismic Record·TypeObservational study·DateAug 26, 2022
A new study reveals two preserved slabs in the upper mantle beneath Myanmar, strongly supporting the double subduction model. The findings provide convincing geoscientific evidence to consolidate this model, which explains anomalously fast India-Asian convergence.
SourceChinese Academy of Sciences Headquarters·JournalScience Advances·DateAug 26, 2022
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A new paper assesses hydraulic fracturing's impact on seismic hazards like microearthquakes. It found that preconditioning with hydraulic fracturing decreases the magnitude and frequency of induced tremors.
SourceSpringer·JournalThe European Physical Journal B·DateAug 17, 2022
The UW Photonic Sensing Facility uses fiber-optic sensing technology to detect ground motions as small as 1 nanometer for seismology, glaciology, oceanography, and infrastructure monitoring. The new center will expand seismic data collection by thousands of times.
A new study has examined the relationship between physical activity and body fat in children, finding that increased body fat leads to less physical activity in boys, while no such link was found for girls. The researchers also found a link between sedentary lifestyle and body fat in boys.
SourceNorwegian University of Science and Technology·JournalInternational Journal of Obesity·TypeData/statistical analysis·DateAug 3, 2022
High stresses persist in the Dachuan-Shuangshi Fault Zone, indicating a moderate risk of strong earthquakes in the Dayi seismic gap. The study suggests that the area is still capable of producing moderately strong earthquakes due to its brittle crustal structure and high stress conditions.
SourceScience China Press·JournalScience China Earth Sciences·DateJul 28, 2022
A novel three-dimensional model of the fluid stored deep in Earth's crust along the Cascadia Subduction Zone provides new insight into how the accumulation and release of those fluids may influence seismic activity. The study's findings have applications for increasing understanding of seismic activity along the Cascadia Subduction Zone.
SourceOregon State University·JournalNature Geoscience·TypeImaging analysis·DateJul 14, 2022
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Scientists found that narwhals experience a large increase in the energetic cost of diving while their heart rate is paradoxically reduced, leading to a significant physiological challenge. The study reveals that prolonged exposure to seismic noise disrupts the normal physiological response of narwhals.
SourceUniversity of California - Santa Cruz·JournalFunctional Ecology·DateJul 8, 2022
A team led by Northern Arizona University will investigate the tectonic and geodynamic processes controlling faulting, magmatism, and surface deformation in the Pacific Ocean. The research aims to better understand the asthenosphere's role in seismic and volcanic events.
Researchers deployed a fiber-optic cable on Grímsvötn's ice cap to detect low-frequency volcanic tremor, revealing the floating ice sheet acts as a natural amplifier of seismic signals. This technology shows promise for monitoring other ice-covered volcano systems.
SourceSeismological Society of America·JournalThe Seismic Record·TypeObservational study·DateJul 6, 2022
Researchers investigated seismic attenuation in the Turkish-Iranian Plateau and Zagros highlands, revealing moderate Sn Q values beneath the plateau and high Q values beneath the Zagros. Additionally, studies explored magmatic processes in West Kunlun, Northwestern China, and the Little Cottonwood stock, Utah, USA, providing insights i...
SourceGeological Society of America·JournalGeosphere·DateJul 1, 2022
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Kestrel 3000 Pocket Weather Meter measures wind, temperature, and humidity in real time for site assessments, aviation checks, and safety briefings.
Researchers analyzed the catastrophic failure of Japan's Misasa Railroad Bridge, revealing that flood hydrodynamic forces exceeded seismic design standards by nearly double. The study recommends increasing space under bridges to reduce submersion and designing structures to withstand overflow.
SourceHiroshima University·JournalJournal of Bridge Engineering·DateJun 30, 2022
A study found that individual factors such as education level and health status are more influential on leisure-time physical activity than municipal resources. Commuting physical activity is also lower in rural municipalities due to longer distances and limited public transport.
SourceUniversity of Eastern Finland·JournalBMC Public Health·DateJun 28, 2022
A new method allows for the separation of signals generated by mining activity from background seismic noise, enabling real-time monitoring of seismic events and structural integrity. This approach could be applied to various environments, including mines, volcanoes, and oil extraction sites.
SourceSeismological Society of America·JournalBulletin of the Seismological Society of America·TypeObservational study·DateJun 28, 2022