A magnitude-8.6 East Indian Ocean earthquake triggered a global increase in seismic activity, with unprecedented large aftershocks occurring worldwide. The study highlights the predictable changes in seismicity, shedding light on more than a decade-long debate about remotely triggered earthquakes.
A magnitude 8.6 earthquake in the East Indian Ocean triggered quakes around the world for at least a week, according to a new analysis. The study found that some faults weren't immediately affected by seismic waves but were primed to break up six days later.
Researchers analyzed seismic activity in Antarctica's David Glacier and found repeating earthquakes every 25 minutes for a year. This study sheds light on stick slip earthquakes and provides a model for understanding ice sheet flow.
A new study published by Arizona State University researchers has found nearly 1,000 small-magnitude earthquakes in Arizona over a three-year period. The improved seismic data from the EarthScope project enabled the detection of these events, which are often not felt by humans.
A new study by Emanuela Guidoboni and colleagues reveals the historical record on ancient and medieval earthquakes in L'Aquila has gaps that must be addressed to assess seismic hazard. The region experienced multiple strong earthquakes, with a tendency to produce simultaneous events varying in impact.
Researchers used ambient seismic noise to search for a pre-seismic signal before the 2004 Parkfield earthquake, but were unable to detect any changes. The study placed an upper limit on how large such a signal might be, depending on its duration and location.
A new method for calculating seismic risk incorporates social factors like crime rates and healthcare, providing a more accurate assessment of urban areas. The approach, developed by Spanish scientists, uses fuzzy logic theory to incorporate qualitative information from expert opinions.
A comprehensive study of tsunamis in Northwestern California has been compiled by UCSB scientists, revealing evidence of smaller strong-to-major earthquakes and larger quakes that involved the regional subduction zone. The research provides valuable insights into the region's seismic activity and potential for future tsunami events.
Researchers at Oregon State University used data from underwater hydrophones and seismic analysis to detect an abrupt spike in energy about 2.6 hours before the eruption, suggesting a new method for predicting undersea volcanic activity. The study also revealed insights into the link between magma intrusion and seafloor deformation.
Recent paleoseismic work reveals an average recurrence rate of 125 years for the San Andreas Fault in the Santa Cruz Mountains, indicating a higher seismic hazard than previously thought. The study also sheds light on how individual segments of the fault system can produce destructive earthquakes.
Scientists analyzed magma chamber crystals and correlated them with seismic signals from Mount St. Helens' 1980 eruption, revealing a clear connection between crystal growth and volcanic activity. This study could improve eruption forecasting by providing insights into the timing of magma input and pulses of seismicity.
Researchers at the University of Bristol used forensic-style chemical analysis to directly link seismic observations to crystal growth in a magma chamber. The study found correlations between peak crystal growth and increased seismicity prior to the 1980 Mount St. Helens eruption.
Researchers analyze seismic data from India to understand past and present Earth dynamics. They also discuss the importance of studying forearc crust and ophiolites to understand subduction zone formation. Additionally, experiments reveal the melting of sediments at high pressures and temperatures.
A WPI research team will conduct fire testing on a five-story building after simulating earthquakes on the nation's largest outdoor shake table. The goal is to gather data that will help engineers design better fire protection systems and provide safer buildings for people and property.
Researchers at Caltech have created a dynamic computer model that reproduces the physics of a fault segment, showing both seismic and aseismic behavior. The model predicts changes in earthquake frequency and location, shedding light on the seismic cycle and potential forecasting of earthquakes.
The American College of Rheumatology (ACR) has endorsed six standardized measures to determine rheumatoid arthritis disease activity. These measures are sensitive to change, can discriminate between low, moderate, and high disease activity states, and include remission criteria, making them feasible to perform in a clinical setting.
A new study evaluates seismic hazards for six capital cities in Central America, with Guatemala City and San Salvador at highest risk. The study provides a regional seismic catalog and strong motion database updated to December 2010, supporting national seismic code revisions.
This bimonthly publication presents research on the Deccan Traps, transfluvial incision in Eastern Papua New Guinea, and late Pleistocene structural evolution of the Camarillo fold belt. Seismic data reveal imprints of volcanism deep beneath the Deccan volcanic province, while river profiles indicate vertical rock uplift and fault motion.
Researchers are conducting a seismic survey at the Mariana trench to map the distribution of serpentinite in subducting plates and overlying mantle. This will help understand island-arc volcanism and subduction-zone earthquakes, which are among the most powerful in the world.
Scientists have discovered a new understanding of the Earth's mantle beneath the Pacific Ocean, revealing that the Gutenberg discontinuity is closely related to the lithosphere-asthenosphere boundary. The study suggests that partially molten rock plays a key role in forming the Gutenberg discontinuity.
Researchers at Indiana University detected unusual seismic signals associated with tornadoes that struck the Midwest last week. The experiment suggests a large atmospheric pressure transient related to thunderstorms may precede tornadoes.
Researchers have converted the Tohoku-Oki earthquake's seismic waves into audio files, enabling the audience to hear pitch and amplitude changes, as well as familiar sounds like thunder, popcorn popping, and fireworks. This unique representation helps explain various aspects of the earthquake sequence, including mainshocks and aftersho...
Researchers have made significant discoveries about the New Madrid Seismic Zone, including its kinematics and potential for stepover structures. Additionally, studies on landslide prediction, gas domes in soft sediments, and regional moisture balance control offer new perspectives on geological phenomena.
A Simon Fraser University researcher discusses documented observations of spatial and temporal coincidences between fracturing and earthquakes east of the Rocky Mountains. The study highlights the need for more research, especially in earthquake-prone areas where injected fluids may trigger seismic activity.
The Transportable Array has reached the US East Coast with the installation of Station 457A in Yulee, Florida. This station generates 3-D 'CT scan' images of the North American continent's geologic structure, providing unprecedented detail about Earth's interior.
A new study finds that seismic faults close to the Fukushima Daiichi nuclear power plant have reactivated after a magnitude 9 earthquake in March. The researchers warn of a higher risk of large earthquakes disturbing the region, which could potentially cause another nuclear disaster.
Researchers explore scaling relationships of slow slip events and compare them to similar laws for earthquakes, highlighting the need for further study to understand fault mechanics. A newly defined propeller-like geometry of southern San Andreas Fault may require re-thinking ground motion assessments.
Researchers are using data from a Utah mountainous region to better understand the effects of topography on earthquake ground motions and seismic risk. The project aims to develop design-ready tools to account for these effects, potentially leading to modified building codes.
Scientists have developed procedures to determine earthquake source information for smaller earthquakes in central and eastern North America. This improved catalog provides detailed information on faulting styles and geometry for these regions, contributing to assessing seismic hazards and constraining ground motion.
Scientists have discovered tranquillityite in Australia's Eel Creek Formation, a mineral previously believed to originate on the Moon. Meanwhile, researchers in Hong Kong present the first three-dimensional seismic velocity model of the region, providing insights into crustal structures and earthquake activity.
Researchers at Princeton University have developed a new model that simulates the seismic fallout of a giant meteorite strike, showing that the impact's effects are scattered and unfocused, resulting in less severe ground displacement and tsunamis. The model also provides new insights into the surface and interior details of other plan...
Geologists Jay Quade and his team discovered rubbing boulders in the Atacama Desert that have been smoothed by seismic activity over millions of years. The phenomenon, which resembles a crowded train station, answers long-standing questions about erosion and landscape evolution.
Researchers have developed a new model to evaluate seismic wave velocities at shallow depth in the Seattle Basin, offering refined seismic hazard assessments. The study also exposes two faults in the eastern Sierra Nevada, providing new details about active faulting in the area.
Researchers used a 16-foot-high steel bridge and four hydraulic shake tables to test the seismic behavior of a curved bridge with vehicles in place. The results will be used to frame changes to current codes and lead to safer bridges during strong earthquakes.
Researchers warn that building codes may overestimate safety in regions prone to both seismic and wind hazards, increasing the risk of structural damage. A new method assesses combined risks using a common metric, showing that dual-hazard conditions can double the risk of failure.
Researchers found diverse mineralogies in two troughs of Noctis Labyrinthus, Mars, indicating a potentially habitable environment and liquid water presence. Additionally, studies on EarthScope seismic observations and the formation of high delta18O fayalite-bearing A-type granite reveal key factors for these unique rock types.
Scientists at University of Nevada, Reno observed an upper limit of three on the number of fault jumps through which an earthquake is likely to rupture. This finding helps reduce uncertainties in estimating earthquake sizes in complex fault systems.
Researchers found that a buried mangrove layer in the Caribbean dampens seismic waves, reducing liquefaction risk. A new active fault was also identified near Lake Tahoe using LiDAR technology, potentially threatening the area with a magnitude 6.4-6.9 earthquake.
The new EarthScope National Office at ASU aims to explore and discover the 4-D structure and evolution of the North American continent. The program deploys thousands of seismic instruments across the US, providing unprecedented data on Earth's dynamics.
The new study creates a detailed image of the Yellowstone plume's electrical conductivity, showing it dips more gently and extends farther east-west. The geoelectric image suggests the plume may be enveloped by a broader sheath of partly molten rock and liquids.
Experts gather to discuss the state of knowledge about the New Madrid Seismic Zone, a region prone to large earthquakes with significant economic losses. Researchers also explore computer simulations of earthquake ground motion in the zone, aiming to understand and anticipate future events.
Hugo Yepes, a renowned Ecuadorian seismologist, will be honored by the Seismological Society of America for his groundbreaking work on earthquake and volcanic mitigation. His research has improved hazard assessment and risk reduction efforts in Ecuador and South America.
The EarthScope Transportable Array has reached a major milestone by installing its first station east of the Mississippi River in northwest Mississippi. This new station will continuously record ground motion from local, regional and global earthquakes for the next two years.
A study found an association between occasional physical activity and a short-term increased risk of heart attack and sudden cardiac death. The absolute risk was small, but those with high levels of regular physical activity were less susceptible to the triggering effect of episodic physical activity.
Researchers at Georgia Institute of Technology found a statistically significant increase in microearthquakes after the Chilean earthquake in February. The study suggests that seismic waves from distant earthquakes can trigger events on the other side of the Earth, with secondary and tertiary waves playing a key role.
Researchers detected a sequence of small earthquakes in Dallas-Fort Worth triggered by brine disposal, highlighting induced seismicity concerns. Seismologists also identified large hurricanes using microseisms recorded at distant seismic stations.
The February issue of Geology explores Patagonian glaciations, the Younger Dryas cold period, and ancient megalakes in Australia. The study provides new insights into the Rio Grande Rift's seismic activity to gain insights into past climate changes.
New UK research found that boys and girls who engage in physical activity with their best friend tend to be more active. The study suggests that encouraging children to exercise with friends outside of school can increase their physical activity levels.
Researchers have found that seismic noise from storms in the South Atlantic Ocean and 'footquakes' from soccer matches can be detected by broadband seismometers. The discovery was made using cross-correlation analysis, which reveals a signal that varies with storm intensity.
Researchers at Arizona State University have discovered a core with an iron-rich center, resembling Earth's core, using array processing techniques on Apollo seismic data. The discovery sheds light on the lunar interior's composition and structure, providing insights into the Moon's ancient origins.
Researchers have created a more accurate seismic model to detect nuclear explosions and differentiate them from natural events. The model spans the complex tectonic region of Turkey to India, and will improve location and characterization of seismic events while reducing errors.
A new study by Northwestern Medicine found that highly active women gain significantly less weight over 20 years compared to their low-activity peers. On average, highly active women gained about 13 pounds less than those with low activity levels.
Researchers are using an array of seismic sensors to study unfelt seismic tremor events, revealing a more complex relationship with potentially devastating earthquakes. By analyzing the movement of these tremors, scientists are gaining insights into the Cascadia subduction zone and its potential for massive quakes.
Researchers, like Virginia Tech's Russell A. Green, focus on paleoseismology and soil liquefaction to calculate annual probability of specific losses due to seismic events. This work aims to implement performance-based earthquake engineering (PBEE) concepts to reduce seismic risk.
Researchers from Universidad Pablo de Olavide and Universidad de Sevilla have found patterns of behavior before an earthquake occur on the Iberian peninsula. The team used clustering techniques to forecast medium-large seismic movements with a sensitivity rate of 90%.
New data suggests that the Limon and Pedro Miguel faults in Central Panama have ruptured both independently and in unison over the past 1400 years. This indicates a significant seismic risk for Panama City and the Panama Canal, with displacements of up to 3 meters recorded.
A decade of research on the Soufriere Hills Volcano has provided new understanding of magma activity, explosive dynamics, and volcano mechanics. The CALIPSO and SEA-CALIPSO projects have generated high-resolution images of the volcano's center and adjacent crust.
Researchers at the University of Bristol have developed a method to measure the movement of the Earth's deep interior, which controls continents and ocean locations. This technique uses seismic waves to study the properties of a mysterious layer called D″, where the mantle meets the core.
A new study published in Nature found that a decline in the Sun's activity may cause the Earth to become warmer, contrary to previous expectations. The research suggests that an increase in solar activity may actually cool the planet, rather than warm it.
Research reveals a causal relationship between rainfall and earthquakes, with variations in rainfall affecting pore-fluid pressure at depth and triggering earthquakes. Ground motion patterns in the Santa Clara Valley are also studied, revealing complex geological structures that influence seismic wave propagation and amplification.