Articles tagged with Earthquakes
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.
Researchers at University of Oregon and US Geological Survey identified past activity clues for the Southern San Andreas Fault, ranking 316 event indicators. They also improved the accuracy of physics-based predictive earthquake simulations, enabling safer building designs.
Researchers have found clear evidence that a major Alaskan earthquake in 2002 triggered tremor episodes on Vancouver Island, revealing the presence of slow-slip events in a subduction zone. The tremors were measured by seismometers and lasted about 15 seconds, providing valuable insights into the rupture process.
Scientists assess natural variation in solar irradiance's impact on Earth's temperature. Early humans' adaptability to high northern latitudes is also studied, indicating a prominent presence around 1 million years ago.
Researchers found that fragmented structure of seafloor faults and volcanic activity dampen the effects of earthquakes. This contradicts conventional wisdom about transform faults, which should be longer and more brittle.
The American Society of Nephrology reviews disaster response plans to ensure dialysis services are protected for patients with end-stage renal failure. The Kidney Community Emergency Response Coalition outlines recommendations for establishing a timeline to safety and creating individualized disaster plans.
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 at University at Buffalo developed a seismic design methodology for bridge towers that allow them to rock during earthquakes, reducing construction and retrofitting costs. The new approach uses devices to control the tower's uplift and absorption of earthquake energy.
Researchers from Oregon State University will travel to Indonesia to collect piston core samples from the seafloor, analyzing evidence of past earthquakes and tsunamis on the Sunda subduction zone. They aim to recreate the seismic history of the region, shedding light on devastating natural disasters.
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.
Scientists found strong evidence that a major earthquake can cause a nearly immediate increase in regional volcanic activity. The intensity of two ongoing eruptions on Indonesia's Java Island increased sharply following a powerful earthquake, and the increased activity persisted for about nine days.
Researchers adapt oil industry technology to image the core-mantle boundary at 2,900 kilometers beneath Central and North America, providing detailed views of the lower mantle. The technique helps understand Earth's internal heat engine and giant cycle of heat production and transfer.
A recent study found that media accounts of past earthquakes, such as the M7.6 Bhuj, India earthquake of 2001, can be misleading due to a natural bias towards dramatic effects. The research compared written accounts with ground-based surveys and concluded that the media bias can be significant, particularly at stronger shaking levels.
Researchers factored in crustal strength changes to improve predictive models for earthquakes along the San Andreas Fault. The study found a disparity between observations and mechanical models, suggesting that crustal changes in fault segments should be included in future models.
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.
A new satellite method has overcome an obstacle to measuring atmospheric water vapor, providing valuable insights for studying climate and weather. Meanwhile, researchers suggest that irrigation may be causing regional cooling that masks the effects of greenhouse gas warming in certain regions.
Researchers at UC Davis have developed a new method to reinforce soil by injecting bacterial cultures that convert loose sand into rock, offering a safer and more efficient alternative to traditional chemical treatments.
Researchers, led by Kristy Tiampo, are working on a new approach to earthquake forecasting that can provide 10-year forecasts for several countries. They aim to pinpoint locations with high earthquake risk and inform government spending and preparations.
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.
A University of Missouri-Columbia researcher is deploying sensors on a mid-ocean ridge to capture rare underwater data, providing valuable insights into volcanic activity and its effects on ocean chemistry. The project aims to improve our understanding of the Earth's oceans, which cover over 70% of the planet.
Researchers at the University of Liverpool have found how fluid pressure can cause earthquakes by sealing fluids within fault planes for long periods. This pressure makes it easier for plates to move, resulting in an earthquake.
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 from Northwestern University find New Madrid rocks surprisingly similar to other areas of the eastern United States, contradicting the idea that hot rocks are weak. The study suggests the fault system may be shutting down, with no large earthquakes expected for thousands of years or longer.
Researchers have modeled past tsunamis to determine the likelihood of future waves and potential impacts on cities along the Sumatran coast. The study reveals that coastal communities face substantial exposure to tsunami surges, particularly in cities like Bengkalu and Padang.
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.
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 Alaska Tsunami Education Program aims to improve math and science skills in students, teaching them how to recognize tsunami signs and react accordingly. The program targets 16 villages, collaborating with local organizations and government agencies to develop workforce-applicable skills.
Dr. Elizabeth Cochran receives the 2006 Subaru Outstanding Woman in Science Award for her groundbreaking work on earthquake triggering, microcracks, and post-seismic displacements. Her research explores intriguing facets of earthquakes using InSAR technology.
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.
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.
Research suggests that seismic shaking can temporarily increase groundwater permeability, which could be exploited to enhance oil extraction. This phenomenon is caused by the gravitational effects of the moon on the solid Earth, forcing water in and out of wells.
Scientists studied earthquakes and tsunamis in the Bering Sea coastline, including magnitude 7.7 quakes, to understand the tectonic history of Kamchatka. The research suggests that Kamchatka sits atop a smaller plate called the Okhotsk block, which is being deformed by convergence zones of tectonic plates.
Researchers have recorded non-volcanic tremors in a deep borehole near Parkfield, California, providing insight into the San Andreas Fault's behavior. The findings help geologists understand whether the fault's deeply buried rocks behave similarly to those in the Cascadia Subduction Zone.
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 found that sediment-filled basins in subduction zones can strengthen the edge of the plate above, increasing the likelihood of large earthquakes. The Cascadia subduction zone is particularly prone to severe shaking due to its forearc basins, which can be up to 3 miles deep.
Researchers at Yale University discovered a key to identifying areas within subduction zones prone to severe damage during earthquakes. Sediment layers deposited on top of the overriding plate cause it to 'stick,' increasing the likelihood of earthquake events in these regions.
Researchers have found that a large swath of territory in the Northeast is slowly moving southward in relation to the rest of the continent. This region is recovering from the weight of ancient glaciers and has long been known to be rising slowly due to their retreat.
Recent Himalayan earthquakes may be followed by larger events in the same region, while medieval earthquakes were much larger and less frequent. The study aims to understand what governs the recurrence interval and size of these rare events.
The SAFOD project reveals a correlation between nonvolcanic tremors and microearthquakes, suggesting a possible causal relationship. The researchers also obtained seismic data during a magnitude 6.0 earthquake in 2004, indicating that damaged rock began forming mineral seals soon after the event.
Climate scientists highlight human impact on temperature extremes, while researchers develop a new method to predict catastrophic earthquakes. Meanwhile, hurricane intensification may be linked to eyewall precipitation patterns.
A geologist is proposing a new approach, called GeoTraverse, to select study sites for the NSF-funded EarthScope project. This approach aims to facilitate greater scientific collaboration and public engagement by selecting areas that can be connected into one or a few east-west transects.
Researchers analyzed seismic wave data from 30 earthquakes and found waves passing through the inner core arrived earlier when separated in time, indicating material had moved into the path taken by waves traveling through the inner core. The study's findings suggest a dynamic planet with significant changes over millions of years.
A new study reveals that earthquake recurrence times exhibit self-similarity, with smaller clusters of earthquakes grouped together within larger clusters. This critical phenomenon may improve risk estimation by showing a clear statistical dependence between earthquakes.
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.
A new study published in Geology estimates the maximum possible earthquake magnitude in the San Fernando and Northridge areas of Los Angeles County. The researchers used paleomagnetism to analyze sediments and found that the crust is broken into blocks, limiting the maximum earthquake magnitude to around 6.8.
Researchers at the Hebrew University of Jerusalem and Geological Survey of Israel developed a new method to date ancient earthquakes using cave evidence. They found evidence of earthquakes with magnitudes of 7.5 or greater occurring in the region over the last 200,000 years, but not in recent times.
Scientists have discovered that deep-sea tremors can be used to predict large earthquakes with high accuracy. By analyzing data from sensors deployed on the ocean floor, researchers were able to set up an early warning system that successfully predicted six major earthquakes in a 15-kilometer radius.
Researchers developed a system that predicted six major earthquakes along East Pacific Rise transform faults using sensor data and foreshock detection. The study suggests short-term earthquake prediction may be feasible under certain circumstances.
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.
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.
Researchers have found evidence of coastal subsidence preceding major subduction zone quakes, potentially providing a warning system for tsunami alerts. The study suggests that areas along subduction zones should monitor subsidence to predict potential earthquakes and tsunamis.
Researchers measured ancient moraine crests to determine past movement on the Karakorum fault, revealing a significant right-lateral motion. The study's findings provide crucial insights into the Asian continent's movement and the collision of India and Asia.
Researchers detected continuous tremors near Cholame, 15 miles southeast of Parkfield, which are similar to those discovered in Japan and the Pacific Northwest. The tremors, which last more than four minutes each, may be precursory to earthquakes, potentially leading to earthquake forecasting and prediction.
A study by the University of Pennsylvania's Wharton School found that preparing for extreme events depends on a complex interplay between risk assessment, perception, and management. Understanding cumulative effects can increase people's willingness to take actions to mitigate risks.
Researchers found that El Nino climate changes contribute to Antarctic cooling through atmospheric circulation shifts. Deep-sea islands stir and fertilize the upper ocean by mixing cold waters with the surface layer, while Siberian forest fires produced hazardous air pollution in western North America.
A team of geologists reports that the Moho boundary is absent beneath California's San Joaquin Valley, due to a mantle drip. The study provides insight into mountain-building processes and explains how the Sierra Nevada formed.
Researchers at the University of Nevada, Reno recorded a cluster of nearly 1,600 small earthquakes beneath Lake Tahoe, causing the nearby Slide Mountain to rise by 8 millimeters. The earthquakes coincided with an unprecedented uplift of the mountain, which scientists believe was caused by magma movement about 20 miles deep.
A recent NASA study has found a significant correlation between the retreat of glaciers and an increase in earthquake activity in southern Alaska. As glaciers melt, they lighten the load on the Earth's crust, allowing tectonic plates to move more freely, which can lead to earthquakes.