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Geotimes May 2007 Kathryn Hansen |
Deep Earth May Hold an Ocean Earth's deep interior, more than 1,000 kilometers below the surface in the mantle, could prove to be a watery place. That's the conclusion researchers drew from an anomaly uncovered by the first global map of Earth's lower mantle, using a new type of seismic analysis. |
Geotimes February 2004 Naomi Lubick |
Pursuing plumes Geophysicists recently presented improved methods for imaging mantle plumes, providing the strongest evidence yet that some plumes extend all the way down to the coremantle boundary. |
Geotimes April 2007 Nicole Branan |
Found: Tibet's Missing Anchor Through new seismic work, researchers may have found a clue to why the Tibetan Plateau is as high as it is. A chunk of upper mantle that's been "missing" for some 15 million years may have contributed to the region's uplift, they say. |
Geotimes November 2003 Naomi Lubick |
Turkish tectonics Researchers recently published preliminary results of the first data collected with modern techniques documenting the tectonic and seismic regimes of eastern Turkey. Their work may overturn conceptions of the tectonic setting of the region. |
Geotimes February 2006 Kathryn Hansen |
Earthquake Rocks East Africa The East African Rift Zone experienced a damaging magnitude-7.4 earthquake Thursday in Mozambique, centered about 215 kilometers southwest of Beira. |
Geotimes March 2007 Carolyn Gramling |
New Madrid Fault Dying? A series of devastating earthquakes that altered the course of the Mississippi River in the early 19th century may have been among the last gasps of an old, dying fault system, a controversial new study suggests. |
Geotimes September 2006 Carolyn Gramling |
Donald Forsyth: At Play in the Field Forsyth emphasizes that collaborating with students and other researchers is not only important to solving tough geological puzzles, but also is much of the fun. |
Geotimes May 2007 Carolyn Gramling |
Slow Earthquakes, Tiny Tremors Small earthquakes and tiny tremors originating deep in fault zones are the result of slow earthquakes at Earth's surface, according to a new study. |
Geotimes October 2006 Carolyn Gramling |
Flexing Plates Produce Volcanoes There's a new kind of volcano in town, according to a new study. |
Geotimes June 2005 Naomi Lubick |
Double-Crossing the Core A team of scientists has taken the properties of a mineral from the Earth's lower mantle, together with seismic observations of the core-mantle boundary, to propose a new model that could elucidate the heat engine that drives Earth. |
Geotimes November 2005 Sara Pratt |
Super-Rotation for Earth's Core A new earthquake study supports the 1996 finding that Earth's inner core is spinning faster than the planet's mantle and crust -- at a rate detectable on human timescales, but about one-third of the rate first suggested. |
Geotimes November 2005 Naomi Lubick |
Bolivian Earthquake Strikes Deep A magnitude-6.9 earthquake rumbled through Bolivia and northern Chile yesterday. No immediate deaths or damage were reported, although people evacuated their homes. |
Geotimes July 2007 Carolyn Gramling |
X-ray Eyes in the Sky Scientists are working on the next generation of low-orbiting satellites that they hope will see far past the Earth's surface and into its interior, to better understand the structure and composition of Earth's crust, mantle and core. |
Geotimes October 2003 Josh Chamot |
Earthquake warning tools The ability to forecast a seismic event has been an elusive goal, but researchers are accepting the challenge and are using recent advances in seismic and computational technology to attempt to decipher Earth's subtle clues. |
Chemistry World March 13, 2014 Emma Stoye |
Piece of Earth's interior 'ocean' found in diamond A tiny crystal found in a diamond has confirmed predictions about a giant store of water deep in the Earth's mantle. |
Geotimes September 2007 Elizabeth Quill |
Earth's Heat Buoys up Its Crust New research suggests that without the heat in Earth's crust and upper mantle creating elevation, much of North America would be underwater. |
Geotimes December 2005 Kathryn Hansen |
Earthquake Shakes East Africa A magnitude 6.8 earthquake shook the Lake Tanganyika region in Africa today. |
Geotimes August 2003 Naomi Lubick |
Fast earthquakes break speed limit Some earthquakes may move faster than seismologists once thought possible. A new study published in the Aug. 8 Science shows the most convincing data yet that a large earthquake can travel down a fault at velocities that surpass theoretical limits. |
Geotimes December 2003 Naomi Lubick |
Glacial earthquakes Seismologists have fingered glaciers as one source of newly discovered "slow" earthquakes. |
Geotimes June 2006 Megan Sever |
Plate Shifts in the Pacific Northwest The far northern section of the Sumatra-style subduction zone in the Pacific Northwest could be transforming into more of a San Andreas-style seismic zone, according to new research. This geologic reorganization could have implications for the region's earthquake risk. |
IEEE Spectrum November 2006 Kieron Murphy |
Q&A: Paul G. Richards, Nuclear Arms Seismologist An interview with the Mellon Professor of the Natural Sciences at Lamont-Doherty Earth Observatory of Columbia University on the science of detecting and measuring nuclear weapons test explosions. |
Geotimes September 2007 Nicole Branan |
Understanding the Crust Beneath Iran The most recent continent-continent collision on Earth began about 10 to 20 million years ago when the Arabian Plate slammed into Eurasia in what is modern-day Iran. An international team of researchers has brought to light an important piece of this ancient history. |
Geotimes September 2005 Sara Pratt |
Sourcing Ultradeep Diamonds Mineral impurities in a diamond may decrease the gem's value for jewelers, but for geologists they can prove to be priceless: South African diamonds containing garnet have recently provided evidence that very deep diamonds can form from surface materials. |
Geotimes September 2005 Naomi Lubick |
Repositioning Tokyo's Fault Seismologists now think Tokyo's fault sits closer to Earth's surface than previously thought. If the fault is indeed shallower, the new assessment has the potential to revise the projected hazards Tokyo may face in the future. |
Geotimes June 2007 Hansen & Gramling |
Are Volcanoes Picky Eaters? New measurements of the concentrations of elements within magma suggest a volcano's food may be a complex recipe -- and that what kind of magma a volcano prefers may affect its physical features, including the size to which it can grow, according to new research |
Geotimes July 2004 Jay Chapman |
Squishy plates Using groundbreaking satellite techniques, new research suggests continental crust reacts to strain more like toothpaste than rigid blocks of rock. |
Geotimes August 2003 Christina Reed |
Making mountains from a molehill Jason Saleeby of Caltech says the Laramide Slab owes its uniqueness to having carried a plateau from the distant seafloor, which helps explain why the shallow oceanic slab sheared off a segment of western North America's continental lithosphere. |
Geotimes September 2003 Sara Pratt |
Zircons reveal mantle evolution A team of Finnish geologists has discovered 3.1 billion-year-old zircons in the Jormua ophiolite of eastern Finland. Although not the oldest zircons on Earth, the Jormua zircons are the oldest yet found in mantle rocks. Their discovery has given scientists a brief glimpse into the history of early plate tectonics. |
Popular Mechanics October 11, 2006 Alex Hutchinson |
Nuke Watch: How Scientists Sniffed Out N. Korea This timely exclusive looks at nuclear detection technology and finds out just how tough it is to hide a weapons blast. |
Geotimes October 2004 |
California's Moho The southern Sierra Nevada mountain range in California has an anomalously thin crust and using seismic imaging, geologists have observed that something is missing. |
Geotimes July 2006 Carolyn Gramling |
Earth Soaks up Seawater Geologists have long thought that seawater does not travel very far through Earth's interior A new geochemical study, however, is challenging that notion, saying that traces of seawater exist deep inside the planet. |
Geotimes April 2007 Kathryn Hansen |
Ocean Waves Drive Earth's Hum High-energy near-shore waves are the main source of energy for the constant seismic background noise known as Earth's "hum." |
Geotimes July 2003 Lisa M. Pinsker |
Challenging core ideas Earth's core has never been so popular -- first plastered over billboards to advertise the recent movie The Core, and now in press worldwide discussing David Stevenson's "modest proposal" to send a grapefruit-sized probe thousands of kilometers into the planet's mysterious core. |
Geotimes October 2006 Carolyn Gramling |
Strong Earthquake Shakes up Hawaii A magnitude-6.7 earthquake rumbled through the island chain of Hawaii, originating near Hawaii island, known as the "Big Island," according to the USGS. An aftershock with a magnitude of 6.0 followed seven minutes later. |
Popular Mechanics October 5, 2009 Amber Angelle |
Earthquake Research Digs Deep to Find Timely Warning System Right now, the best that seismologists can do to "predict" earthquakes is to send out a warning immediately after activity is detected. |
Geotimes July 2004 Sara Pratt |
Core Compositions Scientists are working to explain the differences in composition between Earth and Mars. |
Scientific American March 2005 Madhusree Mukerjee |
The Scarred Earth Tsunami-spawning quake leaves geophysical changes. |
Geotimes November 2005 Naomi Lubick |
Shift in Chile's Seismic History New research documenting tsunami deposits in the Nazca plate region is resetting the seismic clock. |
Geotimes April 2005 Naomi Lubick |
Sumatra Quake Stronger Than Thought Now that researchers have had time to go back to the records, they are finding indications that last December's Sumatra earthquake released much more energy than they thought, in the form of rare low-frequency seismic waves. |
Geotimes November 2005 Naomi Lubick |
Earthquakes Hit China and Iran Two earthquakes killed dozens of people over the weekend, in southern China and a continent away in southern Iran. |
Geotimes July 2003 Greg Peterson |
Quake protection in the heartland A new building code based on a USGS map of earthquake risk suggests that buildings within the New Madrid zone -- which stretches from just west of Memphis, Tenn., to southern Illinois -- should meet the same seismic standards as those in California. |
Chemistry World April 6, 2011 Mike Brown |
Mars chemistry reveals how red planet cooled The chemistry of volcanic rock on Mars offers a picture of the thermal history of the planet, according to scientists in France. The findings could provide a reference point for the evolution of other planets, they say. |
Geotimes October 2004 Katie Donnelly |
Petrology and Politics This scientist is preparing for her upcoming work in Washington, D.C., as the 2004-2005 Congressional Science Fellow for the American Geological Institute. |
Geotimes November 2007 Carolyn Gramling |
How Does Your Continent Grow? Data from ancient mantle rocks are helping to shore up the hypothesis that the continental crust was extracted in pulses, during periodic large melting events in the mantle. |
Geotimes August 2003 Megan Sever |
The Hawaiian hotspot debate: an update Most geologists have long thought that the Hawaiian Islands formed by the Pacific plate moving over a hotspot plume that sat fixed in the mantle; however, recent research suggests a moving hotspot could have been responsible. Still newer research has stirred a new round of debate. |
Chemistry World May 11, 2006 Jon Evans |
Sea Water Assumes the Xenon Mantle Geochemists have uncovered evidence that sea water incorporates noble gases into the Earth's mantle, overturning current theories of how noble gases are transported beneath the crust. |
Geotimes December 2004 Lisa M. Pinsker |
A Passive Approach to Healthy Oil Production A technology first used to help with mine safety has evolved into a tool for the oil and gas industry, with potential in application for sequestering carbon. |
Geotimes October 2006 Jennifer Yauck |
River Bends Reveal Past Quakes The connection between river courses and earthquake activity is allowing seismologists to look at past earthquakes along a Midwestern fault zone with new perspective, and could enable them to more accurately assess future earthquake risk in the Mississippi region. |
Chemistry World July 30, 2009 James Urquhart |
Water linked to mantle oxidation US scientists have used an emerging technique to analyse minuscule samples of magma derived from the Earth's mantle in different tectonic environments and discovered a direct link between water content and the oxidation state of iron within the sample. |
Geotimes January 2007 Nicole Branan |
Heat Flow Causes Magnetic Reversals Earth's magnetic field has done hundreds of somersaults over the last few billion years. A new study sheds some light on what causes the geomagnetic field to flip. |