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Latest Seismology Stories

2012-12-28 15:13:47

A research team led by scientists from Nanyang Technological University (NTU) has discovered that massive earthquakes in the range of 8 to 8.5 magnitudes on the Richter scale have left clear ground scars in the central Himalayas. This ground-breaking discovery has huge implications for the area along the front of the Himalayan Mountains, given that the region has a population density similar to that of New York City. NTU Professor Paul Tapponnier, who is recognized as a leading...

2012-12-17 05:00:31

A new look at the science of plate tectonics Saint Cloud, Fla. (PRWEB) December 17, 2012 “When plate tectonics is viewed as a cycle, it can be imagined to start and restart with eruptions at the earth´s ride and rise system,” explains author and professor John H. Carman. To help explain to readers this geological occurrence, Carman pens his new book, “How the Earth's Plate Tectonic Cycle Works: CMB Reaction” In his new book, Carman offers a new thesis in the...

Using Seismic Waves To Detect Tunnels Is Not As Simple As It Sounds
2012-12-10 15:01:35

Sandia National Laboratories You´d think it would be easy to use seismic waves to find tunnels dug by smugglers of drugs, weapons or people. You´d be wrong. Nedra Bonal of Sandia´s geophysics and atmospheric sciences organization is nearing the end of a two-year study, “Improving Shallow Tunnel Detection From Surface Seismic Methods,” aimed at getting a better look at the ground around tunnels and learning why seismic data finds some tunnels but not others....

2012-12-05 16:24:42

Technique provides insight into ancient formation of underwater plateau Scientists have long used the speed of seismic waves traveling through the Earth as a means of learning about the geologic structure beneath the Earth's surface, but the seismic waves they use have typically been generated by earthquakes or man-made explosions. A University of Rhode Island graduate student is using the tiny seismic waves created by ocean waves crashing on shorelines around the world to learn how an...

Scientists Warn Of Major Earthquakes In Himalayas And Pacific Northwest
2012-12-04 15:18:09

Lee Rannals for redOrbit.com — Your Universe Online Scientists at the American Geophysical Union meeting in San Francisco this week reported that the Himalayas and Pacific Northwest could experience major earthquakes. Researchers have begun studying the complexity of the Himalayan range in greater detail, particularly the fault that separates the two plates known as the Main Himalayan Thrust (MHT). Previous observations indicated a fault that dipped a few degrees to the...

In The Last 300,000 Years The Alhama de Murcia Fault Has Experienced At Least 6 Major Earthquakes
2012-11-12 13:13:08

FECYT - Spanish Foundation for Science and Technology Enjoying Spanish participation, an international group of researchers have analyzed the most recent history of the Alhama de Murcia fault. They discovered that it has experienced six major earthquakes above 7 on the Richter scale. According to the scientists, this provides "convincing evidence" that the maximum earthquake magnitudes in the area are higher than originally thought. Since 2001, researchers from the Universities of...

Landslides Triggered At Extraordinary Distances From 2011 Virginia Quake
2012-11-06 09:45:51

Seismological Society of America The 2011 Mineral, Virginia M-5.8 earthquake was felt over an extraordinarily large area. A new study details landslides triggered by the earthquake at distances four times greater and over an area 20 times larger than previously documented for M-5.8 earthquakes worldwide. The study, to be published in the December issue of the Bulletin of the Seismological Society of America (BSSA), describes physical confirmation of previous observations that ground...

Why Some Quakes Shake Faster Revealed By Tabletop Fault Model
2012-10-31 15:28:04

University of California - Berkeley The more time it takes for an earthquake fault to heal, the faster the shake it will produce when it finally ruptures, according to a new study by engineers at the University of California, Berkeley, who conducted their work using a tabletop model of a quake fault. "The high frequency waves of an earthquake – the kind that produces the rapid jolts – are not well understood because they are more difficult to measure and more difficult to...

Historical Records Suggest Lake Geneva Is At Risk For Future Deadly Tsunami
2012-10-30 08:55:32

Lawrence LeBlond for redOrbit.com - Your Universe Online Scientists have found evidence of a deadly tsunami that inundated coastal Switzerland in AD 563 after a rockfall near the River Rhone swept Lake Geneva. A wall of water 42 feet high crashed the shore, destroying villages along the coast and killing people and livestock, according to historical accounts of the incident. Scientists now say that Geneva and Lausanne remain vulnerable to similar events today, as do other cities on the...

Earthquake Weather
2012-10-25 20:32:14

Brett Smith for redOrbit.com — Your Universe Online The idea of “earthquake weather” can be traced back to the ancient Greeks, when Aristotle is said to have determined that winds trapped underground cause earthquakes by moving about or escaping through cracks in the surface. However, the scientific community has largely dismissed weather-driven earthquakes as myths or relics of an earlier, more mystical society. In fact, the state government of California has listed...


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...

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Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.