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Latest Seismology Stories

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2010-07-29 07:20:00

Researchers said on Wednesday that the risk of earthquakes in the U.S. Midwest may be more widespread than geologists had previously thought.  They found that swept away sediments at the end of the last ice age could have triggered a series of large earthquakes that started in 1811 in the New Madrid seismic zone. They reported in the journal Nature that this suggests these fault segments are unlikely to fail again soon, but the same process could trigger earthquakes on nearby fault...

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2010-07-29 09:31:05

Within weeks of the Haiti earthquake last January, five geoscientists and two engineers from The University of Texas at Austin traveled to the island nation to help assess the damage, identify future earthquake hazards, and make recommendations about how and where to rebuild. They surveyed Haiti from the air, land, coastline and sea. With the rainy season beginning in late April and hurricane season in July, they knew they had to act fast. Storm waves can quickly erase features on the...

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2010-07-27 08:25:31

Thousands of people around the world have died in train wrecks caused by natural disasters. In 2004, the tsunami in Southeast Asia derailed a Sri Lankan train, killing 1,700 people. But with modern advances, these tragedies can be avoided "” and a Tel Aviv University researcher, working in collaboration with teams from seven countries, is leading the way. Prof. Lev V. Eppelbaum of Tel Aviv University's Department of Geophysics & Planetary Sciences and his colleagues are collecting...

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2010-07-09 10:35:23

International research team studied differences between 2004 and 2005 quakes Sumatra experiences frequent seismic activity because it is located near the boundary of two of Earth's tectonic plates. Earthquakes occur at 'subduction zones,' such as the one west of Indonesia, when one tectonic plate is forced under another--or subducts. Instead of sliding across one another smoothly, the plates stick, and energy builds up until they finally slip or 'rupture', releasing that stored energy as an...

2010-07-08 12:58:00

DENVER, July 8 /PRNewswire-FirstCall/ -- Sun River Energy, Inc. (OTC Bulletin Board: SNRV) is pleased to be in receipt of the final report on the results of gravity and magnetic modeling over its Raton Basin Project area by Pearson Technologies Inc. (PTI). "I was intrigued to find so many deep elevator basins in the area," comments Dr. Pearson of PTI. "Many years ago, I spent time in that general area doing field work for a coal company. We never suspected the complex Paleozoic...

2010-06-28 10:36:00

TAMPA, Fla., June 28 /PRNewswire-FirstCall/ -- Proper Power & Energy, Inc. (OTC Bulletin Board: PPWE) announced today the Company released the first data analysis report of its Central Utah prospect as compiled by Thrust Resources geophysicist Robert Dunbar. The Company retained Thrust Resources' compiled Radiometrics Plus survey when it purchased its lease in the Rush Valley in late 2007. This past summer, the Company purchased independent, reprocessed seismic data on the same fields...

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2010-06-24 07:37:26

NASA has released the first-ever airborne radar images of the deformation in Earth's surface caused by a major earthquake -- the magnitude 7.2 temblor that rocked Mexico's state of Baja California and parts of the American Southwest on April 4. The data reveal that in the area studied, the quake moved the Calexico, Calif., region in a downward and southerly direction up to 80 centimeters (31 inches). A science team at NASA's Jet Propulsion Laboratory, Pasadena, Calif., used the JPL-developed...

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2010-06-22 10:15:01

Some areas of the Iberian Peninsula, where earthquakes of moderate magnitude have never yet been recorded, such as certain parts of the Cordillera Cantábrica mountain range, the far west of the Cordilleras B©ticas mountains and the north of Valencia, could have the potential to generate such quakes, according to a study produced by Spanish, Russian and Italian scientists and published this month in the journal Rendiconti Lincei. "The methodology we have used confirms the most...

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2010-06-20 08:05:18

Small stresses might bring big results, says study In nature, random signals often fall mysteriously in step. Fireflies flashing sporadically in early evening soon flash together, and the same harmonic behavior can be seen in chirping crickets, firing neurons, swinging clock pendulums and now, it turns out, rupturing earthquake faults. Scientists have well established that big earthquakes can trigger other big quakes by transferring stress along a single fault, as successive earthquakes in...

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2010-06-17 08:06:51

Third experiment in University of Nevada, Reno series uses innovative materials and construction After a succession of eight separate earthquake simulations, a 110-foot long, 200-ton concrete bridge model at the University of Nevada, Reno withstood a powerful jolting, three times the acceleration of the disastrous 1994 magnitude 6.9 Northridge, Calif. earthquake, and survived in good condition. "This is very satisfying to see how well the design and components worked," Saiid Saiidi, principal...


Latest Seismology Reference Libraries

Seismology
2014-01-12 00:00:00

Seismology is the scientific study of earthquakes and the spread of elastic waves through the Earth or through other planet-like bodies. The field includes studies of earthquake effects, such as tsunamis in addition to diverse seismic sources such as tectonic, volcanic, oceanic, atmospheric, and artificial processes. A related field that utilizes geology to infer information regarding past earthquakes is paleoseismology. A recording of earth motion as a function of time is a seismogram. A...

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2010-11-15 18:30:29

The Richter scale assigns a single number to quantify the amount of seismic energy released by an earthquake. The scale uses a base-10 logarithm by calculating the logarithm of the combined horizontal amplitude of the largest displacement from zero on a particular type of seismometer. A earthquake measuring 5.0 on the Richter scale has a shaking amplitude 10 times larger than one that measures 4.0. The moment magnitude, calibrated to give generally similar value for medium-sized...

0_2d32b95d634235dd48b1f1b3e5949a2e
2010-10-07 16:05:32

The Seismometer is an instrument designed to measure the motions of the ground. This includes seismic waves generated by earthquakes, nuclear explosions, and other seismic sources. Records of these activities allow seismologists to map the interior of the Earth, and locate and measure the size of the different sources. There are also seismographs, which is sometimes used in place of the word seismometer. However, a seismograph is the older instrument in which the measuring and recording...

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