Latest Seismic wave Stories

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...

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...

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...

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...

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...

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...

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...

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...

2005-08-25 16:51:37

WASHINGTON -- The giant iron ball at the center of the Earth appears to be spinning a bit faster than the rest of the planet. The solid core that measures about 1,500 miles in diameter is spinning about one-quarter to one-half degree faster, per year, than the rest of the world, scientists from Columbia University's Lamont-Doherty Earth Observatory and the University of Illinois at Urbana-Champaign report in Friday's issue of the journal Science. The spin of the Earth's core is an important...

Latest Seismic wave Reference Libraries

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...

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
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'