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Latest Seismic wave Stories

ef62695dcb0d15ac7c89d640fae0a9211
2010-09-25 06:40:00

Scientists have wondered for some time why certain seismic waves travel more quickly through the core-mantle boundary, a thin layer of the Earth's interior that lies between about 1675 and 1800 miles below the surface. Now a new study by Yale University and the University of California, Berkeley sheds light on the mystery by showing how this region behaves under the extreme conditions found so deep in the Earth. The findings, which appeared in the Sept. 24 issue of the journal Science, have...

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2010-09-23 10:45:00

A Princeton University-led research team has developed the capability to produce realistic movies of earthquakes based on complex computer simulations that can be made available worldwide within hours of a disastrous upheaval. The videos show waves of ground motion spreading out from an epicenter. In making them widely available, the team of computational seismologists and computer scientists aims to aid researchers working to improve understanding of earthquakes and develop better maps of...

2010-09-02 11:24:30

Using a diamond-anvil cell to recreate the high pressures deep within the earth, researchers at the California Institute of Technology (Caltech) have found unusual properties in an iron-rich magnesium- and iron-oxide mineral that may explain the existence of several ultra-low velocity zones (ULVZs) at the core"“mantle boundary. A paper about their findings was published in a recent issue of Geophysical Research Letters (GRL). ULVZs"”which were first discovered in the early 1990s...

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2010-04-28 11:30:29

University of Calgary researchers listen to earthquake "whispers" reveals new clues about Earth's formation We know more about distant galaxies than we do about the interior of our own planet. However, by observing distant earthquakes, researchers at the University of Calgary have revealed new clues about the top of the Earth's core in a paper published in the May edition of the journal Physics of the Earth and Planetary Interiors. Knowledge of the composition and state in this zone is key to...

75056eb5b1dfd664186f5294a3924dc31
2009-11-25 15:24:05

Earth scientists at Brown University have found strong evidence that the geological processes that lead to the formation of oceanic crust are not as uniformly passive as believed. The team found centers of dynamic upwelling in the shallow mantle beneath spreading centers on the seafloor. Findings are published in this week's Nature. Imagine the Earth's crust as the planet's skin: Some areas are old and wrinkled while others have a fresher, more youthful sheen, as if they had been regularly...

858b15a1a0c2b6513d8ba49dde078702
2009-09-04 12:38:47

A new method of monitoring earthquakes allows scientists to better understand the behavior of deep tremors, Scottish researchers said. By studying seismic waves from separate earthquakes, scientists at the University of Edinburgh were able to measure tremors deeper in the Earth than they could with a seismometer, which measures motion on the Earth's surface, Edinburgh geoscientist Andrew Curtis said. By using earthquakes themselves as virtual microphones that record the sound of the Earth's...

2009-08-17 15:38:19

When Apollo punished King Midas by giving him donkey ears, only the king and his barber knew. Unable to keep a secret, the barber dug a hole, whispered into it, "King Midas has donkey ears," and filled the hole. But plants sprouted from the hole, and with each passing breeze, shared the king's secret.Earth, as it turns out, has other secrets to divulge. From the pounding of the surf and the rumbling of thunder, to the gentle rustling of leaves, Earth is not a quiet planet. The key is knowing...

2009-07-31 12:14:47

Schools and hospitals could one day be protected from feeling the effects of an earthquake. CNRS researchers at the Institute Fresnel in Marseille (1) have come up with a system that could protect buildings from the most destructive seismic waves. Based on mathematical models, such an 'invisibility cloak' could find applications ranging from the automobile and aviation industries to earthquake protection. The paper appears in the journal Physical Review Letters dated 10 July 2009.The...

2009-07-20 10:45:00

Research at the University of Liverpool has shown it is possible to develop an "Ëœinvisibility cloak' to protect buildings from earthquakes. The seismic waves produced by earthquakes include body waves which travel through the earth and surface waves which travel across it. The new technology controls the path of surface waves which are the most damaging and responsible for much of the destruction which follows earthquakes. The technology involves the use of concentric rings of...

2009-06-22 11:50:00

The Earth's mantle, situated under the Earth's crust, is very much the spot for studying interesting geological processes. Although we do not realise it, right under our feet there is a sultry world of circulating Earth layers. We only come into contact with these hot Earth layers in the event of earthquakes and volcanic eruptions. It is therefore important to learn more about the characteristics of the Earth's mantle. These characteristics can be portrayed using seismic waves. However, the...


Latest Seismic wave 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_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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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.