Earthquakes

Earthquakes

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Earthquakes News -- ScienceDaily Earthquake News. Early detection, historic earthquakes, earthquake measurement, smart building methods and more in our earthquake research news.

  • Measuring a crucial mineral in the mantle
    on September 13, 2017 at 11:29 pm

    New research resolves 40 years of debate about the strength of olivine, the most abundant mineral in the Earth's mantle. Measuring the strength of olivine is critical to understanding how strong tectonic plates are, which, in turn, matters to how plates break and create subduction zones. […]

  • Earthquake triggers 'slow motion' quakes in New Zealand
    on September 11, 2017 at 4:27 pm

    Slow slip events, a type of slow motion earthquake that occurs over days to weeks, are thought to be capable of triggering larger, potentially damaging earthquakes. In a new study, scientists have documented the first clear-cut instance of the reverse -- a massive earthquake immediately triggering a series of large slow slip events. […]

  • Machine-learning earthquake prediction in lab shows promise
    on August 30, 2017 at 4:25 pm

    By listening to the acoustic signal emitted by a laboratory-created earthquake, a computer science approach using machine learning can predict the time remaining before the fault fails. […]

  • The losses that come after the earthquake: Devastating and costly
    on August 25, 2017 at 2:40 pm

    Nature's most unpredictable and one of her most devastating natural disasters. When high intensity earthquakes strike they can cause thousands of deaths and billions of dollars in damaged property. For decades, experts have studied major earthquakes; most have focused on fatalities and destruction in terms of the primary effects, the shaking unleashed. […]

  • More than expected hidden beneath Andean Plateau
    on August 23, 2017 at 5:12 pm

    Seismologists investigating how Earth forms new continental crust have compiled more than 20 years of seismic data from a wide swath of South America's Andean Plateau and determined that processes there have produced far more continental rock than previously believed. […]

  • Ancient Earth’s hot interior created 'graveyard' of continental slabs
    on August 22, 2017 at 3:59 pm

    Plate tectonics has shaped the Earth's surface for billions of years: Continents and oceanic crust have pushed and pulled on each other, continually rearranging the planet's façade. As two massive plates collide, one can give way and slide under the other in a process called subduction. The subducted slab then slips down through the Earth's viscous mantle, like a flat stone through a pool of honey. […]

  • Earth history: How continents were recycled
    on August 22, 2017 at 2:32 pm

    Researchers have used computer simulations to analyse how plate tectonics have evolved on Earth over the last three billion years. They show that tectonic processes have changed in the course of the time, and demonstrate how those changes contributed to the formation and destruction of continents. The model reconstructs how present-day continents, oceans and the atmosphere may have evolved. […]

  • New map of seismic hazards created
    on August 21, 2017 at 10:34 pm

    Builders of hydroelectric dams are required to perform seismic hazard studies before their designs are approved. Researchers are working on a new national map of seismic hazards for Brazil. In preparing the seismic hazard map, the researchers first conducted a survey of the tremors that have occurred in Brazil in recent decades in order to determine the level of seismic activity in each region. […]

  • How friction evolves during an earthquake
    on August 16, 2017 at 12:49 pm

    Using high-speed photography and digital image correlation techniques, engineers show that friction along a faultline has a complex evolution during an earthquake that is dictated, in part, by slip velocity: the sliding of the two sides of the fault against one another. […]

  • New plate adds plot twist to ancient tectonic tale
    on August 14, 2017 at 2:44 pm

    Misfit plates in the Pacific led scientists to the discovery of a microplate between the Galapagos Islands and the South American coast. […]

  • Similar characteristics found in human-induced and natural earthquakes
    on August 2, 2017 at 7:25 pm

    Humanmade and naturally occurring earthquakes in the central US share the same characteristics, researchers have found. This information will help scientists predict and mitigate damage from future earthquakes. […]

  • High tsunami danger in Alaska, perhaps elsewhere
    on August 1, 2017 at 2:17 pm

    Scientists probing under the seafloor off Alaska have mapped a geologic structure that they say signals potential for a major tsunami in an area that normally would be considered benign. They say the feature closely resembles one that produced the 2011 Tohoku tsunami off Japan, killing some 20,000 people and melting down three nuclear reactors. Such structures may lurk unrecognized in other areas of the world, say the scientists. […]

  • Group relocation preserves social connections among elderly Japanese Tsunami survivors
    on July 26, 2017 at 6:16 pm

    Relocating in groups, rather than individually, increased informal socializing and social participation among older survivors of the 2011 Great East Japan Earthquake and Tsunami, a new study shows. […]

  • Strength of tectonic plates may explain shape of the Tibetan Plateau
    on July 24, 2017 at 3:35 pm

    Geoscientists have long puzzled over the mechanism that created the Tibetan Plateau, but a new study finds that the landform's history may be controlled primarily by the strength of the tectonic plates whose collision prompted its uplift. Given that the region is one of the most seismically active areas in the world, understanding the plateau's geologic history could give scientists insight to modern day earthquake activity. […]

  • Crustal limestone platforms feed carbon to many of Earth's arc volcanoes
    on July 20, 2017 at 6:22 pm

    A new analysis suggests that much of the carbon released from volcanic arcs, chains of volcanoes that arise along the tectonic plates of a subduction zone, comes from remobilizing limestone reservoirs in the Earth's crust. […]

  • Sea cave preserves 5,000-year snapshot of tsunamis
    on July 19, 2017 at 12:48 pm

    Scientists digging in a sea cave in Indonesia have discovered the world's most pristine record of tsunamis, a 5,000-year-old sedimentary snapshot that reveals for the first time how little is known about when earthquakes trigger massive waves. […]

  • Slow earthquakes occur continuously in the Alaska-Aleutian subduction zone
    on July 13, 2017 at 12:02 am

    Seismologists studying earthquakes in the seismically and volcanically active Alaska-Aleutian subduction zone have found that 'slow earthquakes' are occurring continuously, and could encourage damaging earthquakes. Slow earthquakes are quiet, can be as large as magnitude 7, and last days to years. Taking place mainly at the boundary between tectonic plates, they happen so slowly that people don't feel them. […]

  • Foreshock activities leading up to Pawnee earthquake
    on July 12, 2017 at 6:56 pm

    A geophysics professor details the foreshock activities leading up to the Pawnee earthquake, and highlights the complicated relationship between seismicity and wastewater injection rates in a research study. The study details the precursory earthquake (foreshock) sequences that culminated in the September 3, 2016, 5.8 magnitude earthquake near Pawnee, Okla., which ruptured along the previously unmapped Sooner Lake Fault. […]

  • How strike-slip faults form: The origin of earthquakes
    on July 6, 2017 at 4:11 pm

    One structural geologist calls it the 'million-dollar question' that underlies all work in her laboratory: what goes on deep in the earth as strike-slip faults form in the crust? This is the fault type that occurs when two tectonic plates slide past one another, generating the waves of energy we sometimes feel as earthquakes. […]

  • Engineers find way to evaluate green roofs
    on July 5, 2017 at 5:30 pm

    Green infrastructure is an attractive concept, but there is concern surrounding its effectiveness. Researchers are using a mathematical technique traditionally used in earthquake engineering to determine how well green infrastructure works and to communicate with urban planners, policymakers and developers. […]

  • Forgotten archives reveal street-level impact of 1918 Puerto Rico earthquake and tsunami
    on July 5, 2017 at 5:29 pm

    Repair petitions filed in the wake of the 1918 Puerto Rico earthquake and tsunami, stored and forgotten in the San Juan archives for nearly 100 years, are giving scientists a house-by-house look at the damage wrought by the magnitude 7.3 event. […]

  • Can satellites be used as an early warning system for landslides?
    on July 5, 2017 at 1:54 pm

    Researchers have been tracking the massive landslide which struck Xinmo Village, Maoxian County, Sichuan Province in China. […]

  • Guidelines to reduce the risk of minor earthquakes during hydraulic fracturing
    on July 3, 2017 at 12:54 pm

    Researchers are advising on new safety guidelines for hydraulic fracturing to help prevent minor earthquakes. […]

  • 'Bulges' in volcanoes could be used to predict eruptions
    on June 28, 2017 at 6:49 pm

    Researchers have developed a new way of measuring the pressure inside volcanoes, and found that it can be a reliable indicator of future eruptions. […]

  • Distant earthquakes can cause underwater landslides
    on June 27, 2017 at 5:44 pm

    New research finds large earthquakes can trigger underwater landslides thousands of miles away, weeks or months after the quake occurs. […]

  • Evidence for past large earthquakes in the Eastern Tennessee seismic zone
    on June 26, 2017 at 4:46 pm

    The Eastern Tennessee Seismic Zone (ETSZ), a zone of small earthquakes stretching from northeastern Alabama to southwestern Virginia, may have generated earthquakes of magnitude 6 or greater within the last 25,000 years, according to a new study. […]

  • Hydraulic fracturing rarely linked to felt seismic tremors
    on June 26, 2017 at 4:43 pm

    Hydraulic fracturing and saltwater disposal has limited impact on seismic events, research indicates. […]

  • Six key impact areas of shale oil and gas development in Texas
    on June 19, 2017 at 1:22 pm

    A comprehensive review of the impacts of oil and gas development in Texas by a cross-disciplinary task force of top researchers finds a wide range of both benefits and consequences for the state's environment and communities. […]

  • Seasonal rain and snow trigger small earthquakes on California faults
    on June 15, 2017 at 6:28 pm

    California's earthquake faults continually accumulate stress until they fail in an earthquake. Seismologists studied the impact of the flexing of Earth's crust under the load of winter rains and subsequent unloading during summer drought, and found that the up and down movement of the mountains changes the stresses on the state's faults, making them fail slightly more often as the snows melt and the rivers drain in late summer and early fall. […]

  • Japanese slow earthquakes could shed light on tsunami generation
    on June 15, 2017 at 6:27 pm

    Understanding slow-slip earthquakes in subduction zone areas may help researchers understand large earthquakes and the creation of tsunamis, according to researchers who used data from instruments placed on the seafloor and in boreholes east of the Japanese coast. […]