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Latest Subduction Stories

New Insights Into Great Earthquake In Chile
2014-08-15 03:40:00

GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre A long lasting foreshock series controlled the rupture process of this year's great earthquake near Iquique in northern Chile. The earthquake was heralded by a three quarter year long foreshock series of ever increasing magnitudes culminating in a Mw 6.7 event two weeks before the mainshock. The mainshock (magnitude 8.1) finally broke on April 1st a central piece out of the most important seismic gap along the South American subduction...

tsunami earthquakes
2014-06-28 05:08:15

redOrbit Staff & Wire Reports - Your Universe Online “Sticking points” in the Earth’s tectonic plates caused by extinct undersea volcanoes could be responsible for producing tsunami earthquakes, a discovery which could lead to improved detection of these rare seismic events. Tsunami earthquakes typically occur at relatively shallow ocean depths and are typically of lower magnitude. However, they can create extremely large tsunamis, with earthquakes measuring as little as 5.6...

An Ocean's Worth Of Water May Be Sitting In North American Mantle
2014-06-13 10:28:29

Brett Smith for redOrbit.com - Your Universe Online While all of Earth’s oceans may seem like more than enough water for one planet, a new study published in the journal Science has revealed an ocean’s worth of water may be sitting in the mantle, hundreds of miles below North America. According to the study, molecular water is stored away in a mineral called ringwoodite about 400 miles below the Earth’s surface. The study team said this stored water is sitting in a transition...

Ancient Rocks Provide Clues About Earth's Earliest Crust
2014-05-30 03:14:31

By Bryan Alary, University of Alberta PhD student's studies of four-billion-year-old rocks show ancient crust generated in an Iceland-like setting. It looks like just another rock, but what Jesse Reimink holds in his hands is a four-billion-year-old chunk of an ancient protocontinent that holds clues about how the Earth’s first continents formed. The University of Alberta geochemistry student spent the better part of three years collecting and studying ancient rock samples from...

Researchers Develop New Model Of Earth's Dynamic Interior
2014-03-31 14:24:13

[ Watch The Video: Researchers Develop New Model Of Earth’s Dynamic Interior ] Nikki Cassis, Arizona State University Seeking to better understand the composition of the lowermost part of Earth’s mantle, located nearly 2,900 kilometers (1,800 miles) below the surface, a team of Arizona State University researchers has developed new simulations that depict the dynamics of deep Earth. A paper published March 30 in Nature Geoscience reports the team’s findings, which could be...

3D Computer Models Used To Solve Age-old Geologic Riddle
2014-03-26 12:15:54

[ Watch The Video: The Dynamics of Continental Accretion ] Robert Perkins, University of Southern California New study provides explanation for long-debated origin of bow-shaped mountain belts that form along the edges of colliding tectonic plates An international team of scientists that included USC's Meghan Miller used computer modeling to reveal, for the first time, how giant swirls form during the collision of tectonic plates – with subduction zones stuttering and recovering...

Oceans Earths Mantle
2014-01-27 13:52:44

Lee Rannals for redOrbit.com - Your Universe Online University of Liverpool scientists believe that up to three and a half times the water of all the Earth’s oceans could be being transported beneath our feet. Seismologists reported in the journal Geology that they found deep sea fault zones could transport much larger amounts of water from Earth’s oceans to the upper mantle than previously thought. The team analyzed earthquakes that occurred more than 60 miles below the Earth’s...

Georgia Basin May Amplify Ground Shaking From Next Quake In Vancouver
2014-01-21 08:15:38

Seismological Society of America Tall buildings, bridges and other long-period structures in Greater Vancouver may experience greater shaking from large (M 6.8 +) earthquakes than previously thought due to the amplification of surface waves passing through the Georgia basin, according to two studies published by the Bulletin of the Seismological Society of America (BSSA). The basin will have the greatest impact on ground motion passing over it from earthquakes generated south and southwest...

Dense Earth Crust Was Recycled Into The Mantle During Archean Eon
2013-12-31 07:31:36

redOrbit Staff & Wire Reports - Your Universe Online The temperature of the Earth’s mantle during the Archean eon some four billion years ago was significantly higher than it is today, causing the crust to become unstable and drip back down into the mantle, according to research published this month in Nature Geoscience. As part of the study, Dr. Tim Johnson of the Institute of Geosciences at Johannes Gutenberg University Mainz (JGU) and his colleagues created model calculations...

Scientists Accurately Forecasted Size And Location Of 2012 Costa Rica Earthquake
2013-12-23 07:19:58

Georgia Institute of Technology Scientists using GPS to study changes in the Earth's shape accurately forecasted the size and location of the magnitude 7.6 Nicoya earthquake that occurred in 2012 in Costa Rica. The Nicoya Peninsula in Costa Rica is one of the few places where land sits atop the portion of a subduction zone where the Earth's greatest earthquakes take place. Costa Rica's location therefore makes it the perfect spot for learning how large earthquakes rupture. Because...


Word of the Day
virgule
  • A punctuation mark (/) used to separate related items of information.
  • A little rod; a twig.
This word comes from the Late Latin 'virgula,' accentual mark, a diminutive of 'virga,' rod.
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