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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 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 July 2006 Carolyn Gramling |
Afar From Close-up Powerful stresses in the crust lead to frequent earthquakes and volcanism in the Afar Depression of northeastern Ethiopia. Researchers now say that the source of this activity reveals a possible new connection in Earth's interior. |
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 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 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 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 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 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 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. |
Geotimes December 2003 Naomi Lubick |
Glacial earthquakes Seismologists have fingered glaciers as one source of newly discovered "slow" earthquakes. |
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 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. |
Chemistry World July 22, 2011 David Bradley |
Cracking diamonds reveals continental origins An analysis of the mineral inclusions in diamonds dredged up by eruptions from deep within the Earth has allowed scientists to get a handle on when the process of plate tectonics began. |
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. |
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. |
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 August 2007 Carolyn Gramling |
Earth's Core is Solid, After All Seismic waves passing through Earth's center have long puzzled researchers, as some waves travel fast enough to indicate that Earth's inner core is solid iron-nickel crystals, but they do not travel quite as quickly as scientists would expect, based on studies of stiff iron alloys. |
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 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. |
Scientific American September 2008 Lucas Laursen |
Seismic "Noise"--Oil Prospecting Data Could Decipher Ocean Mixing A ring of warm, salty water in the Atlantic was recently imaged with seismic survey data taken 15 years ago |
Popular Mechanics February 15, 2009 Karen Rowan |
Predicting Earthquakes: Scientists Use Satellites and Drills to Follow a Force of Nature The awesome energy unleashed by earthquakes is something geologists still struggle to understand. To gather information on how the Earth moves, scientists use drills and GPS satellites. |
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 February 2004 Naomi Lubick |
Triggering Tsunamis A controversy over whether an earthquake or an underwater landslide generated the 1998 Papua New Guinea tsunami rekindled interest in such events; it also drew geologists into a field that had been dominated by modelers and seismologists. |
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. |
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. |
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 November 2004 Naomi Lubick |
Detecting Marine Gas Hydrates To better find large enough deposits to extract, scientists are working to improve seismic profiling techniques and other tools for better mapping of gas hydrates. |
Scientific American March 2005 Madhusree Mukerjee |
The Scarred Earth Tsunami-spawning quake leaves geophysical changes. |
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 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 2006 Carolyn Gramling |
Flexing Plates Produce Volcanoes There's a new kind of volcano in town, according to a new study. |
Chemistry World December 4, 2013 James Urquhart |
Diamonds' redox reaction origins revealed Subduction zones -- boundaries between tectonic plates where the Earth's crust sinks into the hot mantle -- could be breeding grounds for diamond formation, according to Russian researchers. |
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 |
IEEE Spectrum June 2007 Jean Kumagai |
A Brief History of Earthquake Warnings The idea of using seismic waves to provide advanced warning of impending doom is not new. Here is a short background to the development of seismic alert systems. |
Geotimes March 2005 Laura Stafford |
Sumatra Seismic Risk Recent research indicates that Indonesia, as well as other regions like the Caribbean, could experience more earthquake and tsunami activity in the near future. |
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 October 2004 Naomi Lubick |
Sound Data for Seismic Array In the fall of 2002, the R/V Maurice Ewing halted a seismic survey in the Gulf of California after two whales beached on the Baja side of the sound. The sound from the ship's array of air guns disturbed the marine mammals. |
Popular Mechanics April 2010 |
How a Hurricane Wavemaker Works (With Video!) To engineer better buildings, researchers at Oregon State University's Wave Research Laboratory bust walls with waves generated by this artificial tsunami machine. |
Geotimes July 2004 Sara Pratt |
Core Compositions Scientists are working to explain the differences in composition between Earth and Mars. |
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 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 2006 Naomi Lubick |
Tibetan Plateau Timing Exactly how and when the Tibetan Plateau's uprising began remains debated. New data suggest that the southern half of the plateau reached its current height before 35 million years ago. |
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. |
The Motley Fool December 7, 2006 Ryan Fuhrmann |
The Best Small Cap for 2007: Dawson Geophysical Seismic firms come in handy with the cyclical nature of the energy industry, and Dawson is a best of class option for investors. |
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. |