A new project led by Georgia Tech aims to develop strategies to help ports manage seismic risk more effectively. The team will evaluate methods of preventing damage using large-scale tests and investigate applying similar approaches to managing risks from other natural hazards.
Scientists detect a seasonal pattern in glacial earthquakes in Greenland, with over one-third occurring during July and August. The increased frequency of these events may be a response to global warming, with significant implications for climate change.
Scientists have found that glacier melting in polar regions is causing a rise in seismic activity, with glacial earthquakes occurring most commonly in summer months. This phenomenon is linked to the movement of massive glaciers and their response to climate change.
Geophysicist Mark Zoback explains that the New Madrid seismic zone is prone to earthquakes due to the legacy effect of a massive glacier pressing into the Earth's surface. He predicts that earthquakes could continue to occur in the region for thousands of years, emphasizing the need for continued research and preparedness.
Researchers at the University of Minnesota have discovered post-perovskite in the D'' layer surrounding Earth's core, explaining its unusual seismic properties. This finding sheds new light on the Earth's evolution and aging processes, offering insights into the planet's history.
A Berkeley lab scientist has found a spike in micro-earthquakes followed by relative calm months before a large quake occurred. This discovery may help predict destructive earthquakes within a shorter time frame than current statistical tools.
Researchers revisited the 1906 San Francisco earthquake to resolve a discrepancy between seismic and geodetic models. The new model suggests that the rupture propagated at 'supershear' speed, resulting in an earthquake of shorter duration.
A study of rhesus macaque monkeys found that individual activity levels are highly variable, regardless of living space, and tend to remain consistent over time. The research suggests that changing one's activity level is difficult due to genetic factors.
John Castagna's developed an algorithm to predict seismic-wave velocities for direct hydrocarbon indicator analysis, detecting oil and gas reservoirs more effectively. This advancement enables explorers to locate hydrocarbon discoveries with higher accuracy, reducing the need for costly drilling operations.
Researchers at Ohio State University are developing a software system to let supercomputers share workload and analyze large amounts of data. This enables faster simulation speeds and improved accuracy in predicting oilfield output, reducing the need for simplification of computer models.
A geophysicist has been awarded a $500,000 MacArthur grant for their exceptional originality and dedication to predicting seismic activity. The grant will provide the researcher with the financial freedom to pursue their innovative work without conditions.
Researchers found a dramatic change in electrical conductivity at 60 kilometers below the ocean floor, with sound waves traveling rapidly above and slowly below. This discovery sheds new light on the process of forming oceanic crust at mid-ocean ridges.
Researchers used reflected seismic waves to image the structure of the lower crust, finding evidence of multiple magma sills forming at different levels. The study suggests that the base of the oceanic crust is formed from several smaller sources of magma rather than a single large pool.
Researchers found evidence for differential rotation of Earth's solid inner core, with the core rotating faster than the surrounding mantle and crust. The discovery suggests electromagnetic coupling is driving the inner core's motion, generating an electric current that causes it to spin.
A graduate student's seismic study has found a sharp dividing line between the lithosphere and asthenosphere, contradicting the idea that the transition is gradual. The research suggests water or partly molten rock must be present in the asthenosphere to cause such an abrupt change.
Researchers uncover stories from native peoples describing seismic activity, shaking, and flooding, linking them to major earthquakes and tsunamis in the Cascadia subduction zone. Ancient artifacts and geological evidence support these findings, shedding light on the region's seismic history.
The Antares programme uses permanent deep-sea seismic sensors to monitor local and global earthquakes, improving risk assessment systems and studying submarine activity. The project overcomes challenges of instrument resistance and coherence between equipment and electronic systems.
Scientists developed a new method to image the earth's rupture during the Dec. 26 Indian Ocean earthquake, providing a fresh perspective on the massive event. The technique uses first-arriving seismic waves to create detailed images in under 30 minutes, which could be used for public-warning and tsunami-alert systems.
Researchers from Stanford University explore the secret world of elephant communication, discovering that elephants can sense underground vibrations generated by low-pitched sounds. The team uses seismic signals to communicate with elephants, finding that they can feel and interpret these vibrations through their trunks and feet.
Researchers found a decreased risk of certain types of ovarian tumors with moderate recreational physical activity, but not others. Physical activity also regulates hormone and growth factor levels, reducing ovarian cancer risk by affecting obesity.
Dr Christine Thomas has discovered a previously undetected seismic layer near the Earth's core-mantle boundary, allowing researchers to measure internal temperatures and study whole mantle convection. The new layer enables scientists to examine the fate of subducted lithosphere and hot material rising from the core-mantle boundary.
Researchers have developed a new method to measure surface waves from normal seismic noise, providing better resolution of the Earth's interior. This technique promises significant improvements in crust and upper mantle image quality down to 60 miles within the Earth.
Scientists have developed a new method to create detailed images of the Earth's interior, improving resolution and accuracy. This technique uses ambient seismic noise, rather than earthquakes, allowing for better understanding of the planet's structure.
Dr. Felix Herrmann proposes a new theory that seismic data may be showing a simpler interplay of only two substances, rather than complex mineralogies, allowing for clearer images and better understanding of the Earth's interior structure. This approach could lead to improved oil patch discovery and enhanced geological resolution.
The Global Seismographic Network can track seismic signals in real-time, allowing researchers to compile and interpret information about potential hazards sooner. The network's unparalleled detail enables scientists to quickly determine the magnitude and location of an event in near real-time.
Penn State researchers are conducting a project to develop a technique for detecting mine voids using seismic signals. The initiative aims to locate and record voids near existing coal mine tunnels, which could help prevent flooding incidents like the Quecreek disaster.
Researchers have made significant discoveries about the impact of human activities on the environment. A new study used satellite observations to estimate nitrogen oxide emissions from ships, which contribute approximately 23 gigagrams per year into the troposphere. Additionally, a seismic analysis technique has provided unprecedented ...
Fred Hilterman, a UH geophysics professor, is being honored with the Cecil Green Enterprise Award for his innovations and dedication in advancing geosciences. He co-founded the Geophysical Development Corporation (GDC), which integrated petrophysical and seismic data, and developed AVO technology to determine the earth's composition.
Researchers studied beaked whale responses to sound frequencies and decibel levels, revealing overestimated deep water impacts and new insights into shallow water reverberations. The study aims to improve safety guidelines for seismic operations in U.S. waters.
Scientists found prolonged changes in hydrothermal activity after a magnitude-7.9 Denali fault earthquake in Alaska triggered more than 1,000 small earthquakes in Yellowstone within a week. Some geysers erupted more frequently while others less often due to changes in water pressure and underground conduits.
Small earthquakes with magnitudes zero to three are recorded in South African gold mines, providing a unique dataset for scientists. The researchers are using this data to investigate the properties of small earthquakes and bridge the gap between laboratory experiments and real-world seismic activity.
Cardiff University is introducing students to state-of-the-art software for interpreting three-dimensional seismic data, enabling deeper study of the earth's structure. The new technology has already helped identify a meteor impact crater off the Yorkshire coast and aims to reduce risk and cost in oil exploration.
The new system uses high-frequency seismic waves to detect buried mines, distinguishing them from soil and ground clutter. Researchers have demonstrated its advantage in laboratory and limited field tests, with promising results at government testing facilities.
Scientists found a possible link between increasing greenhouse gases and European heat waves, while also studying the transfer of energy from earthquakes through Earth's formations. Additionally, research revealed the Amazon River's strong impact on tropical Atlantic carbon levels and new insights into Martian drainage basins that may ...
Researchers used seismic signals and computer analysis to derive outlines of possible secondary faults in the San Andreas Fault zone. The study's findings suggest that continued drilling will encounter significant structures before reaching the fault zone.
Researchers detected physical changes in faults using seismic data from the Parkfield experiment. The study provided evidence for structural changes in fault zones that can be viewed with active seismic monitoring systems.
New analysis suggests earthquakes in the Wadati-Benioff zone are confined to the uppermost part of the Juan de Fuca plate's crust, limiting their magnitude to around 7. However, a quake occurring in both layers could reach a magnitude of 8, posing a risk to the heavily populated Interstate 5 corridor.
Measuring DNA repair enzyme OGG activity found a significant association with lung cancer risk. Smokers and nonsmokers with low OGG activity had higher lung cancer risk compared to those with normal activity levels, with smokers being at greater risk due to smoking alone.
Scientists have developed a new adaptation of seismic reflection profiling to create detailed pictures of oceanic features, including eddies and internal waves. This technique has the potential to improve our understanding of ocean mixing and its role in climate modeling.
Researchers chart seismic effects on water levels to better understand the impact of earthquakes on hydrology. The study found that wells and aquifers respond differently to earthquakes than surface water, with effects recorded at greater distances.
Researchers used GPS receivers to detect seismic waves from a 7.9 magnitude earthquake in Alaska and measure their impact on the US and Canada, revealing large surface displacements. The study showcases the versatility of GPS technology for tracking seismic activity and monitoring natural disasters.
Researchers at Columbia University suggest that ancient faults in the Wabash Valley Fault System may be re-activated, causing recent earthquakes. The study analyzed seismic data from a June 2002 earthquake and found evidence of strike-slip faulting on a near-vertical fault plane at 18 km depth.
A new early-warning system designed for southern California could give people up to 40 seconds of advanced notice of major earthquakes, allowing them to take shelter or evacuate. The system uses low-energy P-waves that travel faster than damaging S-waves and can provide precious seconds to react.
A team of UC Berkeley scientists resolves a long-standing puzzle in earth science by clarifying the depth of the continental lithosphere. By re-examining earthquake-generated seismic waves, they determine that the boundary between the lithosphere and asthenosphere lies at 200-250 kilometers.
The new study modeled earthquakes using computer simulations, finding that sections of the fault with increased material strength can focus energy to an unexpected degree. This results in intense bursts of seismic waves posing significant hazards to nearby structures.
Researchers have discovered that an earthquake can cause damage to a neighboring fault line, potentially leading to more earthquakes. The study, led by UCLA's Vidale, measured seismic wave speed to detect this effect and found it in the Landers fault, which is 10 miles away from the Hector Mine fault.
Seismologists have made significant progress in identifying violations of the nuclear test ban treaty by analyzing technical characteristics of seismic signals. Nearly all questionable events since 1995 have been identified as nuclear explosions, chemical explosions, earthquakes, or mine collapses.
A recent study has revealed a significant decrease in leisure-time physical activity among black girls (56%) and white girls (31%) aged 16-17. Lower parental education levels and higher body mass indexes were found to predict activity decline in both racial groups, while pregnancy was associated with activity declines only in black girls.
Researchers analyzed seismic activity from six stations in West Antarctica, discovering a significant number of small earthquakes. The study confirms that West Antarctica is prone to earthquakes due to its rift-like nature.
Researchers at Columbia University have discovered a correlation between earthquakes and ocean tides, with seismic activity increasing during tidal lows. This study suggests that the seafloor crust is breathing with the ocean tides, allowing for regular tidal scheduling of seismic energy release.
A recent California quake occurred near a forecasted anomaly within the margin of error of its location, validating the University of Colorado's earthquake forecasting method. The scientists used a 'state vector' to characterize seismic activity in southern California and developed a probability index to predict large earthquakes.
The University of California, Berkeley, has deployed a first permanent broadband earthquake monitor in Monterey Bay, which will measure earthquake activity from the ocean side of the fractured fault zone. The instrument aims to reveal new information about seismic activity on the Pacific Plate and improve understanding of earthquakes.
Researchers used experiments and mathematical modeling to understand seismic wave behavior in the lower mantle, finding that mineral grain alignment causes unusual wave behavior. The study provides a window into Earth's inner workings and is an important step toward integrating seismology and geodynamics in the lower mantle.
Researchers have detected a rigid material within the fluid outer core, with implications for Earth's magnetic field and rotation axis. The discovery was made using advanced seismic tomography techniques.
Researchers have made significant discoveries about the San Andreas Fault using a new technique for seismic imaging. The study has provided valuable information on the properties of rocks near the surface and the deep fault line, shedding light on the potential risks and opportunities associated with drilling through the fault.
A study of 754 older adults found that 76.6% reported restricted activity and women had higher rates than men. The research highlights the need for preventive interventions to improve health and functional status in older women.
Research suggests that lifetime physical activity can significantly reduce breast cancer risk, particularly among women engaging in moderate-intensity occupational and household activities. The study found that vigorous activity had little impact on risk reduction, highlighting the importance of frequency and duration of total activity.
Researchers identify a consistent seismic pattern suggesting a recurrence time of 1,500-2,500 years for the 1356 Basel earthquake. This discovery could help safeguard infrastructure and fine-tune emergency procedures before a potential major earthquake strikes.
Seismologist Douglas A. Wiens finds deep earthquakes recur at the same spot repeatedly, supporting ductile shear zone model. The research uses seismic wave evidence to locate earthquakes with accuracy, enabling future study of deep fault zones.
A new study by geophysicists Shelley J. Kenner and Paul Segall suggests that devastating earthquakes could strike the New Madrid seismic zone along the Mississippi River within this century, potentially causing widespread destruction from Arkansas to Iowa.