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| May 14, 2008 |
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Tibetan tectonics trigger China quake: geologists Paris (AFP) May 12, 2008 
The violent quake that shook China's Sichuan province on Monday is linked to a shift of the Tibetan plateau to the north and east, specialists at the Paris Institute of Earth Physics told AFP. "There will certainly be many aftershocks," commented Paul Tapponnier, an expert on tectonics in the region that is prone to earthquakes. The quake, with a magnitude of 7.8, struck close to densely ... read more |
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Sierra Nevada Rose To Current Height Earlier Than Thought
Washington DC (SPX) Apr 29, 2008Geologists studying deposits of volcanic glass in the western United States have found that the central Sierra Nevada largely attained its present elevation 12 million years ago, roughly 8 or 9 million years earlier than commonly thought. The finding has implications not only for understanding the geologic history of the mountain range but for modeling ancient global climates. ... more Possible Link Found Between Earthquakes Along The Cascadia And San Andreas Faults 
San Francisco CA (SPX) Apr 07, 2008Seismic activity on the southern Cascadia Subduction fault may have triggered major earthquakes along the northern San Andreas Fault, according to new research published by the Bulletin of Seismological Society of America (BSSA). The research refines the recurrence rate for the southern portion of the Cascadia fault to approximately every 220 years for the last 3000 years. Chris Goldfinger ... more New Findings From Tibetan Plateau Suggest Uplift Occurred In Stages 
Santa Cruz CA (SPX) Mar 25, 2008The vast Tibetan Plateau--the world's highest and largest plateau, bordered by the world's highest mountains--has long challenged geologists trying to understand how and when the region rose to such spectacular heights. New evidence from an eight-year study by U.S. and Chinese researchers indicates that the plateau rose in stages, with uplift occurring first in the central plateau and later in r ... more Imperial Scientists Explain Tectonic Plate Motions 
London, UK (SPX) Feb 22, 2008The first direct evidence of how and when tectonic plates move into the deepest reaches of the Earth is published in Nature today. Scientists hope their description of how plates collide with one sliding below the other into the rocky mantle could potentially improve their ability to assess earthquake risks. The UK and Swiss team found that, contrary to common scientific predictions, dense ... more Core Samples Obtained From Subsea Fault System Off Japan 
Washington DC (SPX) Feb 06, 2008The third expedition of the Integrated Ocean Drilling Program's Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) completed its mission off the Kii Peninsula. The expedition science party, 26 scientists representing 10 countries, set forth on Dec. 19, 2007, aboard the drilling vessel Chikyu, to evaluate the deformation, structural partitioning, and physical characteristics of the Nankai Tr ... more |
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Washington DC (SPX) Jan 04, 2008Plate tectonics, the geologic process responsible for creating the Earth's continents, mountain ranges, and ocean basins, may be an on-again, off-again affair. Scientists have assumed that the shifting of crustal plates has been slow but continuous over most of the Earth's history, but a new study from researchers at the Carnegie Institution suggests that plate tectonics may have ground to a hal ... more Soft, green rock plays role in earthquakes: study 
Washington (AFP) Dec 20, 2007A dark green, unusually soft layer of rock known as serpentine, which coats tectonic plates, plays a key role in the emergence of powerful earthquakes, a US-French study said Thursday. Serpentine forms deep in the ocean, up to 200 kilometers below the surface, home to some of the world's deadliest earthquakes such as the massive 9.0-magnitude quake that triggered the devastating tsunami off ... more Loma Prieta Fault Not So Weak 
Davis CA (SPX) Dec 20, 2007A new study adds to evidence that the fault responsible for the 1989 Loma Prieta earthquake is not as unusually weak as had been thought. In general, a "weak" fault is one that ruptures relatively easily, resulting in smaller but more frequent earthquakes, while a "strong" fault can accumulate more strain before breaking in larger shocks, said Robert Twiss, professor emeritus of geology at UC Da ... more Deep-Ocean Drilling Researchers Target Earthquake And Tsunami Zone
Washington DC (SPX) Dec 13, 2007Researchers fresh from an eight-week scientific drilling expedition off the Pacific coast of Japan reported their discovery of strong variation in the tectonic stresses in a region notorious for generating devastating earthquakes and tsunamis, the Nankai Trough. The scientists conducted their expedition aboard the new scientific drilling vessel Chikyu, drilling deep into the zone responsib ... more 'Magma P.I.' Unearths Clues To How Crust Was Sculpted 
Baltimore MD (SPX) Dec 04, 2007About a decade ago, Johns Hopkins University geologist Bruce Marsh challenged the century-old concept that the Earth's outer layer formed when crystal-free molten rock called magma oozed to the surface from giant subterranean chambers hidden beneath volcanoes. Marsh's theory - that the deep-seated plumbing underneath volcanoes is actually made up of an extensive system of smaller sheet-lik ... more |
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Tempe AZ (SPX) Oct 26, 2007Seismologists in recent years have recast their understanding of the inner workings of Earth from a relatively benign homogeneous environment to one that is highly dynamic and chemically diverse. This new view of Earth's inner workings depicts the planet as a living organism where events that happen deep inside can affect what happens at its surface, like the rub and slip of tectonic plates and ... more Fault Movement Continues Since 2004 Asian Tsunami 
Logan UT (SPX) Oct 23, 2007Researchers say ongoing uplift following the 2004 Great Sumatra-Andaman Earthquake, which triggered massive tsunamis the day after Christmas, is caused by continuing slip on the quake fault. "Parts of the Andaman Islands subsided, or rose, by up to a yard during the earthquake," said Utah State University geophysicist Tony Lowry who, along with colleagues in Tennessee, Colorado and India, has mo ... more India's lithospheric roots are studied 
Hyderabad, India (UPI) Oct 22, 2007 The Indian sub-continent collided with the enormous Eurasian continent 50 million years ago with enough force to create the Himalayan Mountains. Scientists from the National Geophysical Research Institute in Hyderabad, India, and Germany's National Laboratory for Geosciences determined that with a velocity of about 20 centimeters a year, India was the fastest of the former parts of Gond ... more The Fastest Continent 
Bonn, Germany (SPX) Oct 18, 200750 million years ago the Indian sub-continent collided with the enormous Eurasian continent with a velocity of about 20 cm/year. With such a high velocity India was the fastest of the former parts of Gondwanaland, according to a report by a team of scientists from the GeoForschungsZentrum Potsdam (GFZ, Germany's National Lab for Geosciences) and the National Geophysical Research Institute, India ... more Earthquake Experts At Tel Aviv University Turn To History For Guidance 
Tel Aviv, Israel (SPX) Oct 05, 2007The best seismologists in the world don't know when the next big earthquake will hit. But a Tel Aviv University geologist suggests that earthquake patterns recorded in historical documents of Middle Eastern countries indicate that the region's next significant quake is long overdue. A major quake of magnitude seven on the Richter scale in the politically-fragile region of the Middle East c ... more
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