Quantcast

Latest Seismology Stories

30b2bc6a35657153424919acf8b282501
2011-01-31 09:05:00

The region of Chile that was rocked by an earthquake last February could be at risk for a larger series of tremors, according to a new study published online by the journal Nature Geoscience on Sunday. The 2010 earthquake, which hit the Maule region of the South American country on February 27, "was not unexpected," according to researchers from Italy's National Institute of Geophysics and Vulcanology. "A clearly identified seismic gap existed in an area where tectonic loading has been...

2011-01-19 14:14:39

One year ago, a massive earthquake devastated Haiti. An engineering team from the UA is looking at ways to reduce the carnage inflicted by future earthquakes while the island and its people recover slowly amid disease and mountains of rubble. A team led by University of Arizona earthquake engineer Robert B. Fleischman, associate professor in the UA department of civil engineering and engineering mechanics, traveled to Haiti in 2010 to examine earthquake damage to buildings in...

744bede9c7cb5057b45c1b7a0de58c8e1
2011-01-18 11:31:25

By Tony Fitzpatrick, Washington University in St. Louis Careful analysis shows seismometer noise includes signals from storms in the South Atlantic and 'footquakes' from soccer matches. If you wander up to a seismograph in a museum, unless you are lucky enough to be there right during an earthquake, all you will see is a small wiggly signal being recorded. What's inside the wiggles is called noise by seismologists, because the signal is always there and originates from the normal activity of...

4a01b14d01e49c5a9ce23c4b733bb9ff1
2011-01-13 08:10:00

A new assessment of global earthquake fatalities over the past three decades indicates that 83 percent of all deaths caused by the collapse of buildings during earthquakes occurred in countries considered to be unusually corrupt. Authored by Professor Nicholas Ambraseys of the Imperial College of London and Professor Roger Bilham of the University Colorado at Boulder, the study also found that in some relatively wealthy countries where knowledge and sound business practices would be expected...

a2009f010b6eca1058edf40725ae21bb
2011-01-06 14:57:45

The Moon, Earth's closest neighbor, has long been studied to help us better understand our own planet. Of particular interest is the lunar interior, which could hold clues to its ancient origins. In an attempt to extract information on the very deep interior of the Moon, a team of NASA-led researchers applied new technology to old data. Apollo seismic data was reanalyzed using modern methodologies and detected what many scientists have predicted: the Moon has a core. According to the team's...

a679744fe31070bcdb9a92202ec762431
2010-12-17 08:05:14

New technologies developed by NASA and other agencies are revealing surprising insights into a major earthquake that rocked parts of the American Southwest and Mexico in April, including increased potential for more large earthquakes in Southern California. At the fall meeting of the American Geophysical Union in San Francisco, scientists from NASA and other agencies presented the latest research on the magnitude 7.2 El Mayor-Cucapah earthquake, that region's largest in nearly 120 years....

2010-12-16 14:39:29

Geologists from the University of Rhode Island and Princeton University, in collaboration with Lawrence Livermore National Laboratory, have taken an important step toward helping the United States government monitor nuclear explosions by improving a 3-dimensional model originally developed at Harvard University. The improvements make the model more accurate at detecting the location, source and depth of seismic activity. The results of their research were presented today at a meeting of the...

1cc35992bee3c4a10bfd8c4802d4a2b01
2010-12-10 13:41:18

As the U.S. policy makers renew emphasis on the use of nuclear energy in their efforts to reduce the country's oil dependence, other factors come into play. One concern of paramount importance is the seismic hazard at the site where nuclear reactors are located. Russell A. Green, associate professor of civil and environmental engineering at Virginia Tech, spent five years as an earthquake engineer for the U.S. Defense Nuclear Facilities Safety Board in Washington, D.C., prior to becoming a...

cc78a5eb49b9a5d0c02910155a2cc509
2010-12-02 10:38:27

Researchers from the Universidad Pablo de Olavide (UPO) and the Universidad de Sevilla (US) have found patterns of behavior that occur before an earthquake on the Iberian peninsula. The team used clustering techniques to forecast medium-large seismic movements when certain circumstances coincide. "Using mathematical techniques, we have found patterns when medium-large earthquakes happen, that is, earthquakes greater than 4.4 on the Richter scale," Francisco Martínez...

2010-11-07 10:50:49

Focus of special issue by world's premier seismology journal The devastating 2008 Wenchuan earthquake marks a defining moment for China's earthquake science program. The focus of a special November issue of the prestigious Bulletin of the Seismological Society of America (BSSA), the M 7.9 earthquake has garnered intense interest among seismologists, allowing the Chinese science community to demonstrate its capability to a global audience. The earthquake produced an enormous disaster, killing...


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...

0_5badd37024d78e3386e67ababbfe35a0
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...

More Articles (3 articles) »
Word of the Day
mallemaroking
  • Nautical, the visiting and carousing of sailors in the Greenland ships.
This word is apparently from a confusion of two similar Dutch words: 'mallemerok,' a foolish woman, and 'mallemok,' a name for some persons among the crew of a whaling vessel.