Researchers found low-velocity pockets along the rifting axis indicating areas filled with gas, raising concerns about environmental implications. The trapped gas could be a potential untapped natural resource or contribute to greenhouse gases if released.
Researchers analyzed past major earthquakes in Mexico and Chile to understand earthquake cycles and calculate future seismic hazards. The data also helped develop new ideas about the physical processes involved in seismic rupture, geometry of subduction, and tsunami generation in the region.
A recent study analyzed 100,000 localized seismic events to search for patterns in the data. Researchers found that earthquakes of differing magnitudes share more similarities than previously thought, suggesting predictable characteristics may aid forecasting.
Researchers have discovered a connection between earthquakes and volcanic eruptions at Mount Aso in Japan. By analyzing very long period seismic waves, they found that earthquakes can trigger changes in pressure variations associated with magmatic activity, leading to eruptions.
A large study published in The BMJ found that even light physical activity reduces the risk of early death, with more intense activity having a greater impact. The study analyzed data from over 36,000 adults and found that spending 9.5 hours or more sedentary per day increases the risk of death.
Researchers at Arizona State University have developed a method to predict seismic activity from wastewater disposal, which can help the energy industry manage injection-caused earthquakes and reduce risks. The team's physics-based framework successfully reproduces the distribution of actual earthquakes by frequency, magnitude, and time.
A new study found that seismic air gun signals can damage the sensory organs and righting reflexes of rock lobsters. The research, published in the Proceedings of the Royal Society B, reveals that exposure to these signals can cause lasting harm to lobsters' statocysts and ability to function in the wild.
A comprehensive map of over 250 faults has identified the Fort Worth Basin as highly susceptible to seismic activity, with many small faults potentially capable of triggering earthquakes. The study recommends increased regulation and monitoring of wastewater injection to minimize the risk of induced seismicity.
Researchers at KAUST have developed a computational method to model large accumulations of subsurface salt, a challenging material to derive accurately from seismic imaging data. This technique allows for the efficient extraction of oil and gas by pinpointing fossil fuel reservoirs with greater accuracy.
Seismic and electrical conductivity observations suggest water is present in the Earth's mantle, affecting dynamics and causing earthquakes. Hydrogen and water play key roles in lower internal friction, magma generation, and mantle convection.
The 2015 Gorkha earthquake's rupture length was likely controlled by spatial variations in the Main Himalayan Thrust, according to a new study led by Prof. BAI Ling from the Institute of Tibetan Plateau Research. The researchers used seismic waveforms and waveform modeling to determine source parameters and velocity structures.
A study published in Nature Communications suggests that historical earthquake stresses can predict future seismic activity. Researchers analyzed centuries-old written records of damage to reveal 97% of earthquakes occurred on positively stressed faults.
A comprehensive catalog of earthquake sequences in the Fort Worth Basin reveals a decrease in seismicity rates since 2014, corresponding to reduced wastewater injection. New faults have become active, and seismicity continues at greater distances from injection wells over time.
Researchers have identified areas with persistent seismic signals caused by industrial processes using a dense sensor network spanning the US. The map, developed by Los Alamos National Laboratory, pinpoints prominent sources of industrial activity, including wind farms and large water pumping stations.
Researchers are investigating whether metamaterial concept can be scaled up to city size to reduce earthquake damage. Simulations show that structures act as resonators, plucking energy from Rayleigh waves, and optimal building arrangement could reduce damage by decreasing height radially inward.
Volcano seismologist Jacqueline Caplan-Auerbach studies Loihi's 1996 eruption for parallels to Kilauea's 2018 activity, suggesting a caldera collapse mechanism. Loihi's recent increase in seismicity may indicate magma replenishment, predicting Kilauea could be quiet for a decade before reactivating.
Researchers found a strong correlation between meltwater runoff and seismic activity in the region, suggesting that seeping water may trigger small earthquakes. The study suggests that the shallow nature of the earthquakes is due to the unique geology of the area, with steeply dipping rock layers acting as a conduit for meltwater.
A recent study suggests that reinforced concrete walls in Seattle may experience up to 11% larger displacement and a higher probability of collapse during magnitude 9 earthquakes due to basin effects. The research highlights the need for updated building codes and retrofits to mitigate potential damage.
A study found that increasing physical activity can eliminate the association between sedentary behavior and increased mortality risk. Replacing sitting with standing or vigorous physical activity was more consistently associated with risk reduction in high sitters.
Researchers found that light-intensity physical activity is associated with larger brain volume and healthy brain aging. The study suggests that achieving even moderate levels of physical activity may be beneficial for preventing dementia.
A new study catalogs nearly 1.8 million tiny tremors in Southern California, filling gaps in the earthquake record and shedding light on geophysical processes. The analysis reveals that about 495 earthquakes occur each day in the region, with most being small and imperceptible.
Researchers investigated surface deformation caused by a 6.5 magnitude earthquake using field investigations, geologic data, seismic reflection profiles, and earthquake relocation results. The study suggests the Pishan earthquake is a folding event that occurred in the upper crust.
Researchers expand earthquake catalog by a factor of 10, revealing daily quakes at 495 locations across the region. The study's template matching technique identifies tiny tremors, expanding our understanding of seismic events and their impact on the region.
Research suggests that physical activity levels begin to decline around age 7, with childhood and adolescence playing a significant role in determining long-term inactivity. Factors such as parental support, socioeconomic status, and chronic illnesses can influence an individual's likelihood of persistent or increasing activity.
A new method combines seismic data with crowdsourced information from the internet, smartphones, and Twitter to detect earthquakes more quickly. This approach reduces detection time for felt earthquakes to just 1-3 minutes, improving situational awareness.
Researchers Christoph Sens-Schönfelder and Tom Eulenfeld used seismic waves generated by surf and tidal effects to study subsurface properties. They found that the velocity of these waves can reveal information about deformations in the Earth's material, allowing for non-destructive analysis of subsurface stress and strain fluctuations.
A new study found that replacing a half hour of sitting time with light physical activity was associated with a nearly 50% reduction in mortality among the least active participants. Replacing sedentary time with moderate-intensity physical activity was also linked to a lower risk of death, although the association was smaller.
Researchers at the University of Tokyo have developed a new way to sense earthquakes using gravitational signals, which can detect seismic waves ahead of time. The method has been proven reliable with 7-sigma accuracy and could lead to improved early warning systems that save lives.
Researchers are using machine learning to analyze seismic data, identify earthquake centers and distinguish seismic activity from noise. Machine learning methods can also preserve analog records of past earthquakes by categorizing images.
Scientists have discovered a new way to monitor carbon dioxide storage plumes underground using coda waves, which reveal the location of gases in the ground. This method could enable more frequent and cost-effective tracking of these plumes, allowing for better estimation of total gas reserves.
A 2-month lasting ultra-slow earthquake occurred south of Istanbul, coinciding with moderate-sized seismicity at shallow depth. The study sheds light on the interaction between aseismic slow deformation and seismically released energy, enhancing regional seismic risk assessment for the densely populated city.
A study at Oregon State University found that 'silent slip' - a brief episode of shallow mantle creep and seismic swarms - occurs before large earthquakes. The research deployed seismometers on the ocean bottom to detect over 1,600 earthquakes at the Blanco Ridge fault.
Seismic activity near Oroville Dam was related to reservoir discharge altering pressure on underlying rock fractures, causing them to open and close. The events occurred for decades prior to the dam's spillway failure and continued after it.
Researchers applied machine learning to analyze Cascadia data, discovering a constant tremor that predicts slow slippage and fault failure. The study found a direct parallel between the loudness of the signal and the physical changes, allowing for more accurate predictions of megaquakes.
A seismic study spanning the Mariana Trench reveals that subduction zones drag about three times more water into the deep Earth than previously estimated. The observations highlight the important role of subduction zones in the global water cycle, with implications for our understanding of the Earth's interior.
Researchers analyzed historical data to determine the sources of destructive Indonesian earthquakes, finding that intraslab earthquakes were responsible for many damaging quakes. The study suggests that Indonesia's 2010 and 2017 seismic hazard assessments perform well in predicting ground motion in key Javanese cities.
A PLOS study found that Australians who understood the health benefits of physical activity and its risks associated with inactivity were more likely to engage in regular exercise. The research suggests that knowledge of specific health conditions linked to inactivity may play a key role in influencing physical activity behavior.
Research found that static activities, such as strength training, were more strongly associated with reducing heart disease risks than dynamic activities like walking and cycling. Both types of physical activity appeared to be heart healthy, even in small amounts, at the population level.
A new seismic study reveals that subduction zones drag about three times more water down into the deep Earth than previously estimated. The observations from the Mariana Trench have important implications for the global water cycle, suggesting that much of the Earth's water is being recycled through volcanic activity.
A study using algae deaths reveals the amount of uplift during the 2016 magnitude 7.6 Chiloé earthquake was approximately 25.8 centimeters, confirming a 3-meter maximum fault slip. This finding helps assess seismic hazards in the Chilean Subduction Zone and informs efforts to predict future major earthquakes.
Research suggests that physical activity levels should be considered a vital sign to monitor children's overall health. The study found that most US children do not meet the recommended daily exercise guidelines, with only 5.2% meeting the standards.
Researchers from GFZ found micro-earthquakes prior to a 4.2 magnitude earthquake in June 2016, south of Istanbul. The study suggests that analyzing these small events could extend warning times for future earthquakes in the region.
Scientists have discovered that winds blowing across Antarctica's Ross Ice Shelf cause it to vibrate, producing a near-constant set of seismic tones. The vibrations can be used to monitor changes in the ice shelf from afar and may provide insights into climate change.
A team of researchers analyzed seismic and acoustic data from US Navy explosions off the Florida coast to better understand the relationship between local magnitude and charge weight. They found that both types of data can be used to identify underwater explosions, with seismic signals providing clearer evidence.
A novel method for monitoring surface wave velocities in the shallow subsurface has been developed by researchers at Kyushu University, providing high spatiotemporal resolution. The approach enables accurate detection of natural phenomena and fluid leakage from deep underground storage sites.
Researchers identified a collapsed underground cavity and multiple small earthquakes after the September 2017 North Korean nuclear test, providing insights into the detection of nuclear explosions. The study's findings also shed light on seismic stress in the region and potential aftershocks.
Researchers successfully located the epicenter of the September 2017 North Korean nuclear test using regional seismic data. The study's findings confirm that subsequent seismic events were not also nuclear explosions.
Researchers developed a method to estimate seismic risk by modeling various earthquake scenarios and identifying common impacts. The study suggests that most scenarios produce lower impacts than the worst-case scenario, with urban areas posing less risk than rural western Nepal.
Researchers developed a new seismic risk modeling approach to assess earthquake impacts and identify common hazards across multiple scenarios. The 'ensemble modeling' method provides critical information on likelihood and probable scale of future earthquakes' impacts, enabling targeted disaster mitigation resources distribution.
Data from the U.S. Geological Survey's Mid-Atlantic Resource Imaging Experiment (MATRIX) provides new insights into gas hydrate features and structures below the seafloor. The research cruise acquires over 2,000 kilometers of marine seismic data, revealing shallow gas deposits and structural features beneath methane seeps.
A study of 1,826 adolescents found that higher current total activity was associated with lower VLDL and triglycerides, while longer-term activity showed similar results. The findings suggest that it's never too late to benefit from physical activity, but maintaining regular engagement is key.
The study found that global levels of physical activity have remained stagnant since 2001, with over a quarter of the world's adult population not meeting recommended levels of activity to stay healthy. In 2016, around 32% of women and 23% of men worldwide were insufficiently active.
A joint British-Italian team has shown that the clustering of three deadly quakes in Italy's Apennine mountains may have been caused by a cross-cutting network of underground faults. The research found that smaller faults prevented a single massive earthquake from occurring and also triggered later earthquakes.
Researchers at Harvard University have developed a new method to monitor water levels in underground aquifers using seismic noise. They were able to measure the water depth of an aquifer in California to within a centimeter, and estimated that half a cubic kilometer of water was pumped out during a drought. This technique has the poten...
The Woods Hole Oceanographic Institution (WHOI) will provide seafloor seismographs and technical support under a new cooperative agreement, starting August 1, 2018. The OBSIC replaces an earlier instrument pool, providing unique insights into seismic activity and ocean basins.
Scientists at Oregon State University analyzed 44 years of seismic data and found clear evidence that tremors of magnitude 6.5 or larger trigger other quakes of magnitude 5.0 or larger.
The study identifies at least three tears in the Indian mantle lithosphere underthrusting the Himalayas. This model explains patterns of crustal deformation and east-west extension in southern Tibet, providing insights into the region's seismic activity.
A new model provides the clearest picture yet of the geology below the Tibetan Plateau, revealing tears in the Indian upper mantle layer. The research suggests that these tears are responsible for earthquakes in the region, shedding light on the complex geological processes at play.
Researchers from the University of Houston have reported a new understanding of deep earthquakes, finding they are hosted in anisotropic rocks. This discovery explains why deep earthquakes radiate seismic energy differently than shallow ones, offering insights into the causes of these events.
Researchers at Tohoku University studied the 2011 Tohoku-oki earthquake to understand the causal mechanism. They used seismic tomography and found that both the upper Okhotsk plate and lower Pacific plate contributed to the formation of a hard patch responsible for the earthquake.