A team led by researchers at San Diego Supercomputer Center successfully completed record-setting, petascale-level simulations of the earth's inner structure. They achieved a shortest period of 1.15 seconds and 161 teraflops, using 149,784 cores.
Researchers detected large gas reservoirs in mid-crust rocks using seismic method, contradicting conventional wisdom about gas-anomaly locations. Gas-filled tiny fissures in rocks cause significant decrease in seismic wave velocity.
Researchers found that self-efficacy is a strong predictor of physical activity levels at 12 months, while access to home exercise equipment was more predictive of adoption. Decisional balance, behavioral processes, outcome expectations, and enjoyment also play significant roles in maintaining physical activity.
A team led by Professor Douglas Wiens is conducting a comprehensive study of Antarctica's Gamburtsev Province, using radar and seismic imaging to understand the region's geological history. The research aims to shed light on the formation of continental ice sheets and climate models.
A U.S.-led team of scientists will use advanced radar and seismic tools to explore the Gamburtsev Mountain range in Antarctica. They hope to determine how this massive mountain range formed, defying geological understanding, and whether it played a role in shaping the East Antarctic Ice Sheet.
Researchers Jan Schmedes and Ralph J. Archuleta found that locally ground motion increases near the epicenter but not equally along the rupture plane of large earthquakes. A new method for estimating detection capability was also developed, providing a more complete picture of seismicity.
Researchers Theresa Jefferson and John Harrald will study social vulnerability in response to an earthquake involving the New Madrid fault. The grant from FEMA enables them to focus on displaced persons, shelter needs, commodity requirements, and special needs in Phase III of the Mid America Earthquake Center research agenda.
Researchers have discovered that studying crystal formation in volcanoes can reveal the timing between magma movement and eruptions. This technique allows scientists to better understand individual volcano behavior, helping inform civil defense decisions.
A linear string of mud pots and volcanoes indicates a surface evidence for the southern extension of the San Andreas Fault. Researchers identified 33 geothermal features forming a clear pattern, revealing a planar rift extending to considerable depth in the crust.
Researchers used topographic analysis to identify active faults in the Sichuan earthquake, which can help refine existing maps of earthquake risk. This approach can shed light on blind and hidden faults in remote mountainous areas.
Scientists use a method developed for detecting underground nuclear tests to identify mine collapses and detect additional surface seismic waves. The new technique compares model seismograms to observed data, helping to differentiate between collapse events and other seismic activities.
Researchers measured changes in rock stress affecting seismic wave speed at depths where earthquakes occur, detecting 'preseismic' changes before two earthquakes. The findings could lead to a better understanding of fault-zone stress and improve earthquake prediction.
Researchers measured seismic wave speed changes before two small earthquakes on the San Andreas Fault, finding anomalies that occurred hours before the events. The findings suggest a 'stress meter' could provide an indication of imminent earthquakes.
A new analysis of the devastating May 12 earthquake in China found that it resulted from faults with little seismic activity. The quake occurred at a boundary between two tectonic plates and was caused by the obstruction of rapidly flowing crustal material, leading to a simultaneous rupture of two separate but contiguous faults.
Researchers discovered that an Antarctic ice stream radiates seismic waves, similar to earthquakes, due to the 'stick-slip' phenomenon. The ice stream moves about 18 inches within ten minutes, producing two bursts of seismic waves per day.
Numerical earthquake models are providing a means to understand physical processes and predict earthquakes, reducing damage and loss of life. Simulations show that surface-rupturing earthquakes absorb more seismic energy than buried ones, resulting in less ground shaking.
A review of 62 studies found that physical activity significantly reduces breast cancer risk in lean women, particularly those who engage in moderate and vigorous exercise after menopause. Obesity and family history of breast cancer counteract these benefits.
A study suggests seismic hazard maps for New Madrid and Charleston zones may be less dire than current predictions, as a new model assumes earthquakes are less likely to occur immediately after a major quake. The 'time-dependent' model sheds light on assumptions in hazard mapping, which affect building codes and preparations.
Researchers have found a potential link between seismic activity on the southern Cascadia Subduction fault and major earthquakes along the northern San Andreas Fault. The study suggests that Cascadia earthquakes may trigger San Andreas earthquakes, with an average recurrence rate of approximately 220 years for both faults.
The SEISMIC study found that injecting muscle cells into scarred areas of the heart improved patients' symptoms, including increased walking distance, but did not improve heart function or size. Researchers concluded that cell therapy is feasible and may provide symptom relief for heart failure patients.
Researchers have created a three-dimensional model describing the seismic anisotropy and iron crystal texture within Earth's innermost core. The study revealed an inner inner core with a diameter of approximately 1,180 kilometers.
A UM Marine geology and geophysics student has been awarded the prestigious MARGINS Student Prize for her research on slow slip and slide dynamics in the Nicoya Peninsula, Costa Rica. Her study revealed a 'slow slip event', where energy is released over several weeks instead of seconds, sparing damage to the surface environment.
A network of seismic instruments has been placed around Panama's Baru Volcano to help detect eruptions and mitigate danger. The Panamanian government funded the instrumentation, completed by the University of Panama's Department of Geosciences, in response to a joint study that revealed the volcano's potential for future eruptions.
A new seismic model reveals that earthquakes at Mount St. Helens are caused by a resonating fluid-filled crack filled with steam, driving a small explosive eruption if the pattern is disturbed. This finding challenges the previous stick-slip model and provides a more detailed understanding of the volcano's behavior.
Researchers from Uppsala University found that the body-centered cubic crystal structure of iron in the inner core explains seismic wave patterns. This discovery may impact our understanding of the earth's heat balance and magnetic field stability, opening new perspectives for studying the earth's past, present, and future.
Researchers understand that a smooth decrease in stress at the end of a primary fault reduces the likelihood of an earthquake jumping to another fault. This study highlights the importance of slip gradient and rupture front acceleration in determining fault jump probability.
New seismic images of the Chicxulub crater suggest the asteroid that killed the dinosaurs landed in deeper water than previously thought. This led to a larger release of water vapor into the atmosphere, which could have exacerbated the effects of acid rain and climate change.
Scientists have discovered that sound waves can trigger earthquakes in a laboratory setting, inducing aftershocks long after the initial quake. This finding has significant implications for understanding earthquake behavior and may provide clues to catastrophic events in other granular media.
Researchers found a 30% increase in tremor activity with rising tides, contradicting assumptions that water would clamp down on the movement. The tremors are likely caused by tidal stresses from gravitational influences of sun and moon.
Scientists have identified a major fault and recent fault activity that contribute to massive tsunamis in the Nankai Trough. The research provides insights into the risk of giant tsunamis in other regions, allowing for better assessments and mitigation strategies.
Researchers identify correlation between 3D basin geometry and observed shaking in previous earthquakes, leading to improved construction and seismic hazard assessments. A new tool for evaluating site conditions is also proposed, which could aid in risk assessment for earthquake-prone regions worldwide.
The Los Angeles basin has entered a relatively quiet period of seismic activity, with smaller and less frequent earthquakes reported over the past thousand years. The study's findings suggest that seismic clusters in the Mojave Desert alternate with periods of calm in the urban fault network.
A CU-Boulder-led study suggests that a 2006 tectonic plate motion reversal near Acapulco did not ease seismic strain in the region. Instead, it sped up by four times, making a major earthquake less likely, according to Professor Kristine Larson.
Scientists developed a new technique to discriminate between small earthquakes and mine blasts, achieving a success rate of 97%. Researchers also created the most detailed 3D model of the Hayward Fault System in Northern California, revealing that it poses the greatest risk for major quakes in the next 30 years.
Researchers developed a data-driven computational approach to analyze seismic data and discover unique patterns of gene expression. The technique, which combines inverse scattering and modern statistics, allows for the automatic generation of an appropriate model from raw data.
A new mooring system has been installed on top of Kick'em Jenny, a submarine volcano, allowing for real-time data collection and transmission. This will improve researchers' ability to detect precursory activity before an eruption takes place.
A new report suggests that ocean warming may cause changes to the planet's rotation, potentially shortening the length of day by approximately 0.12 milliseconds. Additionally, researchers have found a link between seasonal seismicity in the Himalayas and fluid infiltration, which could modulate earthquake generation.
Researchers used seismic imaging to detect layered structures within the Tonga subduction zone's mantle wedge, revealing unexpected features that contradict textbook models. The study suggests water and fluids played a key role in shaping the mantle structure, with implications for the formation of volcanic arcs.
The Seismological Society of America honors MIT's M. Nafi Toksoz for his 40-year investment in the field, defining seismology and its practice. He has mentored over 100 postdoctoral students, promoting a research environment at MIT.
A British study of 5,500 children found that low physical activity levels are a significant contributor to the development of obesity. The researchers used advanced techniques to measure fat mass and activity, finding a strong statistical association between lower activity and higher fat mass.
Researchers have found that tiny tremors and temblors in fault zones are generated by slow-moving earthquakes that may precede mega-quakes. The study suggests that detecting these weak signals could be useful in forecasting seismic hazards, particularly in subduction zones where the most destructive earthquakes occur.
Researchers in France have successfully modeled the defects responsible for deformation in the Earth's mantle layer, a 2900-kilometer-deep region that has long puzzled geophysicists. By studying dislocations at the atomic scale, they gained insights into the layer's deformation and its effects on convection movements within the mantle.
Researchers at the University of Nevada used precariously balanced rocks to test seismic hazard predictions, measuring forces and angles to determine when an earthquake has not occurred for a long time. The study provides important information on seismic hazards in areas throughout the West, including data on ground-motion probability ...
Researchers from TU Delft have successfully applied seismic interferometry to extract information from seismic noise, which can be used to search for new oil fields. The method has shown promising results in a desert in the Middle East.
A recent study highlights the urgent need to update design standards in stable continental regions like Peninsular India. The assessment shows that major urban areas are underprepared for earthquakes, with risks exceeding current safety standards.
Scientists discover that seismic data cannot reliably map boundaries between rock units in young oceanic crust, altering views on new crust formation and life deep below the seafloor. Despite this limitation, seismic data holds keys to understanding fluid circulation and subsurface biosphere.
Researchers have discovered a drumlin, a mound of sediment and rock, actively forming and growing under the ice sheet in Antarctica. The study, using time-lapse seismic surveys, reveals the drumlin grew ten times faster than expected, providing new insights into the drag on the underside of the ice.
The project, led by the University of Kentucky and the Kentucky Geological Survey, allows instruments to gather data on earthquakes' effects on bedrock and soil. The observatory will add new data to the existing network, helping geologists better define the earthquake hazard in the region.
Scientists explore factors that pulled Earth out of its 'Snowball Earth' state and study seismic wave speed in the lower mantle. Researchers also investigate water vapor in Saturn's upper atmosphere using Cassini radio occultation data.
Researchers at Brown University and Columbia's Earth Institute recovered two lost ocean-bottom seismometers, providing unprecedented insights into the process of seafloor spreading. The data from the instruments reveals increasing seismic activity before a major episode of seafloor creation, offering a unique 'ear to earth's belly'.
Researchers analyzed data on consecutive earthquakes to find that seismic activity may affect a larger area than previously believed, potentially supporting long-range earthquake triggering. This phenomenon challenges the traditional view of earthquakes influencing only their immediate rupture zone.
The study ranked top 10 states based on seismic activity, with Nevada ranking third, behind Hawaii and Alaska. The rankings were determined by analyzing earthquake data from 1898 to 2005, including data from the USGS catalog of significant U.S. earthquakes from 1568-1989.
Researchers at University of Colorado Boulder found that Himalayan mega-earthquakes occur every 1,000 years to release stored energy in southern Tibet. This new information helps forecast future seismic activity in the region.
The University of Houston has received a $1.4 million grant to provide students with hands-on training in the petroleum industry. The donation includes the KINGDOM Suite software, which will be used for research and classes.
A team of researchers found that earthquake swarms can occur anywhere with seismic activity, challenging the long-held assumption that they are only linked to volcanic and geothermal zones. The study suggests that swarminess in these areas may be driven by hot water or magma pushing fault seams apart.
A new study reveals the San Jacinto fault is no older than 1.1-1.3 million years, with its slip rate likely faster than previously thought. The fault's long-term motion may be as high as 20 millimeters per year, making it a significant contributor to seismic hazards in southern California.
Seismologists from Stanford University pinpointed the source of non-volcanic signals emanating from a Japanese fault zone, likely caused by 'silent earthquakes' that displace ground without shaking it. These events may foreshadow powerful seismic temblors and contribute to seismic hazard forecasting.
A recent study published in JAMA Network found that older adults who engage in more daily physical activity have a lower risk of death. The researchers measured energy expenditure over a two-week period using doubly labeled water and found that higher levels of activity were associated with a 69% lower risk of death.
Scientists propose using GPS to aid in ocean-wide tsunami warning systems by detecting early seismic wave data. Researchers also explore unsolved problems in the lowermost mantle, including the origin of the D
Researchers discovered that slow-moving silent earthquakes can trigger swarms of tiny conventional tremors, potentially providing early warnings for mega-earthquakes. This discovery has raised hopes for seismic hazard forecasting in subduction zones worldwide.