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Latest Seismic wave Stories

9f9596a68bc3c2e1c8ac4ce12659f56d1
2009-04-24 08:26:30

The most powerful earthquakes happen at the junction of two converging tectonic plates, where one plate is sliding (or subducting) beneath the other. Now a team of researchers, led by Teh-Ru Alex Song of the Carnegie Institution's Department of Terrestrial Magnetism, has found that an anomalous layer at the top of a subducting plate coincides with the locations of slow earthquakes and non-volcanic tremors. The presence of such a layer in similar settings elsewhere could point to other regions...

b73b63641589328f6464a8ba4915b5661
2009-03-26 09:55:00

University of Utah scientists devised a new way to find miners trapped by cave-ins. The method involves installing iron plates and sledgehammers at regular intervals inside mines, and sensitive listening devices on the ground overhead. "We developed an approach to find the location of trapped miners inside a collapsed mine, regardless of noise from the environment around the mine," says Sherif Hanafy, an adjunct associate professor of geology and geophysics at the University of Utah and first...

7820054cd1bb083c178a2eacb9950e891
2009-03-19 09:46:31

A newly laid, 32-mile underwater cable finally links the state's only seafloor seismic station with the University of California, Berkeley's seismic network, merging real-time data from west of the San Andreas fault with data from 31 other land stations sprinkled around Northern and Central California. Laying of the MARS (Monterey Accelerated Research System) fiber-optic cable was completed in 2007 by the Monterey Bay Aquarium Research Institute (MBARI) to power and collect data from a...

940166bea39df5a874e83c5a7fe0053c1
2008-11-25 10:28:33

Research Team Shatters Two-Second Barrier, Named Finalists for Gordon Bell Prize at SC08 A team led by researchers at the San Diego Supercomputer Center at UC San Diego has successfully completed record-setting, petascale-level simulations of the earth's inner structure, paving the way for seismologists to model seismic wave propagations at frequencies of just over one second "“ the same frequencies that occur in nature. Results of these latest seismic wave simulations were announced at...

05af90034756603249076e317c542c48
2008-07-10 06:25:00

Scientists say they have discovered the ability to predict an earthquake hours before it strikes simply by studying changes in rocks. The study, published in the journal Nature on Thursday, said the observations used sensors that were lowered into holes previously drilled in an earthquake zone. U.S. researchers found stress-induced changes in rocks hours before two small sized tremors ran through the San Andreas Fault in California. Paul Silver of the Carnegie Institution for Science...

68e10cedd319fd4910ca2964fd231bea
2008-06-05 13:22:43

Stick, slip, like an earthquakeA seismologist at Washington University in St. Louis and colleagues at Pennsylvania State University and Newcastle University in the United Kingdom have found seismic signals from a giant river of ice in Antarctica that makes California's earthquake problem seem trivial.Douglas A. Wiens, Ph.D., Washington University professor of earth and planetary sciences in Arts & Sciences, and colleagues combined seismological and global positioning system (GPS) analyses...

2008-05-06 17:28:49

You know Earth's schematic: core, mantle, crust, right? Sorry, not so simple. Like the gooey center of a chocolate morsel harboring peanut butter and honey, inner Earth is far more nuanced than outward appearances would suggest. A new model is proposed in the May 2 issue of the journal Science. Earth is made up of several layers, once thought to be pretty distinct. The skin, or crust, goes down about 25 miles (40 km). Below that is the mantle area, which extends about...

0f197c92bd6150f1bb6862b1a2beaec21
2008-03-10 16:30:00

Geologists at the University of Illinois have confirmed the discovery of Earth's inner, innermost core, and have created a three-dimensional model that describes the seismic anisotropy and texturing of iron crystals within the inner core. "For many years, we have been like blind men touching different parts of an elephant," said U. of I. geologist Xiaodong Song. "Now, for the fist time, we have a sense of the entire elephant, and see what the inner core of Earth really looks like." Using both...

6157376dd4b3b595fe8995cca614e7a61
2007-02-12 11:09:15

A seismologist at Washington University in St. Louis has made the first 3-D model of seismic wave damping -- diminishing -- deep in the Earth's mantle and has revealed the existence of an underground water reservoir at least the volume of the Arctic Ocean. It is the first evidence for water existing in the Earth's deep mantle. Michael E. Wysession, Ph.D., Washington University professor of earth and planetary sciences in Arts & Sciences, working with former graduate student...

98db8173811b1323bfb882231c47f8051
2005-11-09 12:55:00

LOS ANGELES -- Scientists have found a way to estimate an earthquake's ultimate strength by analyzing the initial seconds of a rupture - a step that could one day provide early earthquake warning. Currently, a quake's magnitude - or how much energy is released - is determined after the shaking stops, usually minutes after an event. But researchers from the University of California, Berkeley, say the measurements of seismic waves soon after a temblor can signal whether it will be a minor or...


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
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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