Articles tagged with Tectonic Plates
Researchers investigated seismic anisotropy in the Tianshan Tectonic Belt's upper crust, finding zoning patterns that correlate with tectonic stress fields. Time delays of slow waves also exhibit spatial differences, indicating stronger anisotropy in certain zones.
Researchers at NTU Singapore discovered a 32-year 'slow-motion' earthquake that led to the catastrophic 1861 Sumatra earthquake. The study highlights potential missing factors or mismodelling in global earthquake risk assessments.
Researchers at University of Toronto and Istanbul Technical University have discovered a new geologic process in plate tectonics that reveals early damage to areas of Earth's crust long before they are geologically altered by known plate-boundary processes. This challenges current understandings of the planet's tectonic cycle.
A shallow locked region south of Cartagena city suggests significant earthquake and tsunami hazard, with a magnitude 8.0 earthquake capable of occurring every 600 years. Researchers urge continued densification of the GPS network to better understand and evaluate this hazard potential.
A team of researchers from the University of Houston found that the asthenosphere, a hot and softer layer beneath tectonic plates, is flowing vigorously, driving plate motions. This 'river of rocks' has been actively flowing for eight million years, shaping the Earth's surface and influencing earthquakes.
Researchers at the University of Houston have located the long-debated Resurrection tectonic plate in northern Canada, shedding light on its existence and significance. The findings could aid in predicting volcanic hazards and mineral deposits.
Passelègue's groundbreaking study sheds light on the dynamics of faults, finding that initial strain plays a crucial role in determining rupture speed and energy release. His model shows that higher strains trigger faster ruptures while lower strains result in slower ones.
New seismic data gathered by Stanford University researchers provides the first west-to-east view of the subsurface where India and Asia collide. The study suggests two competing processes are operating beneath the collision zone: movement of one tectonic plate under another, as well as thinning and collapse of the crust.
Researchers from Cardiff University have identified specific conditions along the ocean floor where tectonic plates creep past each other instead of generating catastrophic earthquakes. This discovery could help scientists better understand stress at fault lines and improve earthquake forecasting.
Researchers found evidence of continental growth starting as early as 4.4 billion years ago, indicating that tectonic plate movement began more than a billion years earlier than previously believed. This discovery challenges our understanding of Earth's geological history and suggests a complex process involving the recycling of crust.
Researchers from Germany, Chile and the US use satellite data to identify Earth's surface deformation months before massive earthquakes. This detection enables scientists to better understand precursor activity that may trigger earthquakes.
Harvard researchers have detected some of the earliest evidence for modern-like plate motion in ancient rocks from Australia and South Africa, dating back to 3.2 billion years ago. The study suggests that tectonic movement occurred on the early Earth, providing valuable insights into the evolution of life and climate.
Researchers at the University of Ottawa have found evidence that slow earthquakes are related to dynamic fluid processes at the boundary between tectonic plates. The team used a technique similar to ultrasound imagery and analyzed rock properties to confirm that fluid pressures fluctuate during an earthquake cycle.
A high-resolution catalog of earthquakes from the 2019 Ridgecrest sequence reveals complex rupturing and crosscutting fault structures. The catalog helps researchers understand the triggering and evolution of the sequence, shedding light on the physics and processes involved.
A new framework for integrated geodynamic models is being developed by a team of researchers, including Clemson mathematician Timo Heister. The Advanced Solver for Problems in Earth's Convection (ASPECT) software will simulate processes in the Earth's mantle, providing insights into geological events and tectonic plate movements.
Researchers have discovered a new petit-spot volcano in the Pacific Ocean near Minamitorishima Island, Japan. The young volcano is thought to have erupted less than 3 million years ago and provides valuable insights into the asthenosphere.
A team from University of Tokyo utilized Summit's AI architecture to develop a faster solver for earthquake simulations, enabling more accurate models. The new approach accelerated simulation times by a factor of 1000, improving the efficiency and reliability of earthquake modeling.
A 900-mile stretch of volcanoes in the Pacific Ring of Fire became dormant for 10 million years due to a prominent bend in the Hawaiian Islands chain and a crack in the Pacific Ocean Plate. The crack, formed by opposing plates moving in opposite directions, disrupted the water-laden conveyor belt that drives volcanic activity.
A $2.7 million NSF grant will study an active flat slab in Colombia, investigating its effects on the continental crust and volcanism. The research will compare two parts of the flat slab, allowing scientists to understand the initial migration and cessation of volcanism, as well as the formation of ore deposits.
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.
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.
A new study published in Earth and Planetary Science Letters proposes that plate tectonics could have started as early as the planet's formation. Researchers analyzed noble gas isotopes Helium-3 and Neon-22 to establish a timeline of Earth's tectonic plate cycling, providing insight into the planet's earliest conditions.
Researchers at UMass Amherst used advanced seismic imaging and data from the National Science Foundation's EarthScope program to construct a detailed model of the tectonic plate beneath the Adirondack Mountains. They discovered a 'pillow' of low-density, relatively light rock material that appears to have been squeezed up under the mou...
Researchers at University of Illinois found geological signs pointing to catastrophic supervolcano eruptions would be detectable hundreds to thousands of years before an eruption. The study suggests that people need not panic, as the precursors to massive eruptions will be long-lasting and far greater than recent seismic activity.
Researchers suggest a cycle linking supercontinent formation to tidal energy, which controls ocean wave strength. Strong tidal energy fosters nutrient mixing, sustaining ocean life, while low tidal energy may lead to oxygen-starved oceans.
Slow slip events (SSEs) release seismic stress at a lower rate than large earthquakes, potentially triggering megathrust earthquake events. The study analyzed waveform data from beneath Kanto, Japan, and found that seismic activity varied in response to SSEs, through episodic cycles.
Researchers created synthetic specimens similar to upper mantle rocks and measured their rigidity under conditions simulating the Earth's mantle. This study challenges a long-held theory that defects involving water absorption in normally dry rocks control seismic wave speeds.
A team of scientists, led by Penn State's Demian Saffer and Laura Wallace, is installing observatories beneath the sea floor to study slow earthquakes. They aim to uncover links between slow earthquakes, large normal earthquakes, and tsunami generation risk.
Recent studies suggest that the Hawaiian hotspot moved southward at a rate of several tens of kilometers per million years. This new evidence contradicts the long-held assumption that hotspots are stationary and supports a dynamic Earth model.
Scientists have mapped the temperature and viscosity of the lower crust for the first time, finding hot rocks under much of the western US that are near their initial melting point. This study suggests significant regions of the lower crust lack strength, potentially leading to mountains being flattened over millions of years.
A new study suggests that heat from a deep-seated oceanic mantle source, rather than a traditional mantle plume, drives crustal melting and surface volcanism in the western US. The research uses seismic tomography to peer into the subsurface and develop a hybrid geodynamic model that better matches observed geologic histories.
New study reveals that frequency and magnitude of large Himalayan earthquakes depend on tectonic plate collision rate, which controls temperature and earthquake generation areas. The team found a link between plate collisions in the Alps and Himalaya, with slower collisions increasing earthquake hazard.
Researchers at University of Toronto and Istanbul Technical University propose an 'active drip' model for the formation of the Central Anatolian Plateau, where the lower tectonic plate has dripped below Earth's surface. This process is linked to the planet's crust and upper mantle thickening and sinking into the lower mantle.
Researchers found that the strength of olivine increases with decreasing grain size, indicating the mantle is weaker than believed. This discovery may help understand how tectonic plates form and deform.
Researchers used instrumented nanoindentation to measure olivine's strength, finding it weaker with larger diamond tips. The study resolves a long-standing debate on the mineral's strength and has implications for understanding plate tectonics and volcanic activity.
Researchers at Oxford University have discovered that tectonic plates are weaker than previously believed, thanks to laboratory experiments. The study sheds light on how plates break and form new boundaries, with implications for understanding earthquake-generating faults.
Researchers developed a method to analyze hot spot tracks and found most groups are fixed and relatively motionless, moving at about 4 millimeters per year. This contradicts previous findings that suggested hot spots moved as much as 33 millimeters a year.
A new study published in Nature Communications suggests that the Tibetan Plateau's unique shape may be explained by the strength of the tectonic plates involved in its formation. The research found that a strong Asian plate results in a narrow plateau, while a weak Asian plate produces a broad one.
A new study reveals that the 60-degree bend in the Hawaiian-Emperor chain is primarily caused by a directional change in the Pacific plate motion. The research also suggests that some southward plume motion is required, but this cannot be explained by current mantle convection models.
Researchers have developed a new method to investigate underwater volcanoes that produce Earth's tectonic plates. The study found that molten rock is present deeper than expected, indicating faster cooling of the plate, which affects friction at collision zones and megaquake sizes.
Researchers estimate that the next major earthquake in Istanbul will originate from the Eastern Marmara Sea due to a build-up of energy from entangled tectonic plates. This could lead to a shorter early warning period, but potentially less severe ground shaking than expected.
The Kaikoura earthquake triggered widespread slow slip events, producing simultaneous patches of slip in other areas. Ground faulting was complex, rupturing at nine to 12 faults with multiple orientations, resulting in a combined rupture length of about 180 kilometers.
Researchers found that a divergent plate boundary can be forced to converge, leading to the formation of a new subduction zone. The study suggests that buoyant but weak plate material at a divergent boundary can resist subduction, but eventually gives way to denser older material, creating a self-sustaining subduction zone.
Researchers found evidence that the mantle flows in a direction ahead of recent changes in plate motion, suggesting it may be responsible for past and current changes. The study also explored magma supply under mid-ocean ridges, finding larger volumes at segment ends than previously thought.
Researchers are analyzing data from the September 16, 2015 magnitude 8.3 earthquake in Illapel, Chile, to gain insights into the boundary's dynamics and predict future earthquakes. The study aims to map out strain release, identify active faults, and describe deformation of the top plate.
A new study suggests that oceans may be a significant source of free hydrogen gas, produced by slow-spreading tectonic plates on the seafloor. This finding could have far-ranging implications for our understanding of life on Earth and the potential for clean energy.
A new study suggests that the Riasi fault in Indian Kashmir has been building up pressure for thousands of years, potentially leading to a magnitude 8.0 or greater earthquake. The fault's lack of recent seismic activity increases the likelihood of a major event, posing a significant threat to millions of people in the region.
Scientists have found that pieces of the underside of the North American Plate are peeling off, sinking into the mantle, and causing earthquakes in the southeastern US. This process is likely to produce more earthquakes in the future due to unbalanced stresses in the plate.
Geologists now track tectonic plate motion to understand ocean and mountain range formation, as well as animal species distribution. The technology reveals new geological relationships in Papua New Guinea and the Solomon Islands, with implications for predicting earthquakes and volcanic eruptions.
Researchers have identified 10 additional superchrons in the Proterozoic Eon, revealing a similar rate of geodynamo-driven reversals for most of the past two billion years. This discovery challenges existing models of core evolution and the geodynamo process.
Scientists have discovered evidence of ancient continental collisions in the Teton Range, dating back 2.68 billion years, providing new insights into the early history of plate tectonics. The study found significant differences in the composition of the ancient crust compared to modern plates.
A new study suggests that a thicker Earth mantle may be responsible for some of the planet's inner processes. The research found a significant increase in the Earth's mantle viscosity at depths of 1,000 kilometers, challenging previous estimates.
Researchers have found distinctive rocks formed when the Pacific plate changed direction and plunged under the Philippine Sea Plate 50 million years ago. The discovery sheds new light on the formation of copper and gold deposits, as well as the mechanism behind massive earthquakes and volcanoes.
The Andes mountain chain was formed 14 million years ago, according to new research from the University of Bristol. The study used a novel method based on cosmic rays to determine the age of large boulders in the western margin of the Andes.
A team of scientists has discovered the first oceanic microplate in the Indian Ocean, helping identify when the initial collision between India and Eurasia occurred. The collision is believed to have led to the formation of the Himalayan Mountain Range at a precise age of 47 million years ago.
Researchers developed a mathematical model to estimate stress in bedrock, enabling predictions of fracture locations and landslides. The study reveals topography above ground influences weathering below the surface, improving understanding of geological processes.
A Northwestern University expert found mixed results on human preparedness for tsunamis, with significant progress made in tsunami science and education. However, substantial challenges remain, including the impact of 'tsunami earthquakes' and the need to incorporate new knowledge into warning procedures.
Researchers have identified a key factor driving intraplate seismicity: convective currents of semi-liquid rock beneath the Earth's crust. This process interacts with surface motion, influencing earthquake locations and frequency. The study's findings offer new insights into seismic hazard mapping in plate interiors.
Researchers use geological features to predict seismic activity in regions with low historical earthquake records. Experts warn that even seemingly quiet areas can harbor significant quake risks, highlighting the need for increased preparedness and monitoring.
Scientists have identified two key factors behind sudden tectonic plate movements, including the role of thick crustal plugs and weakened mineral grains. This discovery provides new insights into the evolution of plate tectonics and its impact on Earth's climate and biosphere.