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Latest Seismology Stories

Waves Generated By Russian Meteor Recorded Crossing The US
2013-03-07 13:29:53

National Science Foundation A network of seismographic stations recorded spectacular signals from the blast waves of the meteor that landed near Chelyabinsk, Russia, as the waves crossed the United States. The National Science Foundation- (NSF) supported stations are used to study earthquakes and the Earth's deep interior. While thousands of earthquakes around the globe are recorded by seismometers in these stations--part of the permanent Global Seismographic Network (GSN) and...

Russian Meteor Is The Largest Ever Detected By CTBTO’s Infrasound Sensors
2013-02-19 12:31:59

CTBTO Infrasonic waves from the meteor that broke up over Russia´s Ural mountains last week were the largest ever recorded by the CTBTO´s International Monitoring System. Infrasound is low frequency sound with a range of less than 10 Hz. The blast was detected by 17 infrasound stations in the CTBTO´s network, which tracks atomic blasts across the planet. The furthest station to record the sub-audible sound was 15,000km away in Antarctica. The origin of the low frequency...

Geologic Facelift For Appalachian Mountain Basin
2013-02-01 08:45:25

redOrbit Staff & Wire Reports - Your Universe Online Despite the absence of any recent tectonic activity in the area, one region of the Appalachian Mountains looks vastly different from its surroundings, leading a team of US researchers to conclude that the location had undergone a transformation they refer to as a “geological facelift.” Sean Gallen, a graduate student in marine, earth and atmospheric sciences at North Carolina State University, and Karl Wegmann, an...

San Andreas Fault Wouldn't Stop Statewide California Quake
2013-01-12 07:54:47

redOrbit Staff & Wire Reports — Your Universe Online Assumptions that the San Andreas Fault would automatically prevent an earthquake from affecting both northern and southern California at the same time may not necessarily be true, according to a new study published Wednesday in the online edition of the journal Nature. According to Eryn Brown of the Los Angeles Times, geologists have assumed for several years that the fault line would act as a barrier, preventing seismic...

Himalayas Will Have More Massive Earthquakes, Warn Scientists
2012-12-31 11:33:53

Brett Smith for redOrbit.com - Your Universe Online An international team of researchers has found that a pair of massive, historical earthquakes ruptured the surface in the central Himalayas–leading them to theorize that similar quakes will threaten the region´s population in the future. According to the team´s report in Nature Geosciences, the two quakes, in 1255 and 1934, measured between 8 and 8.5 magnitudes on the Richter scale and both left distinct scars in...

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...


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
barratry
  • The offense of persistently instigating lawsuits, typically groundless ones.
  • An unlawful breach of duty on the part of a ship's master or crew resulting in injury to the ship's owner.
  • Sale or purchase of positions in church or state.
This word ultimately comes from the Old French word 'barater,' to cheat.
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