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Latest Seismology Stories

2013-04-17 15:42:20

News from the Seismological Society of America 2013 Annual Meeting Salt Lake Valley, home to the Salt Lake City segment of the Wasatch fault zone and the West Valley fault zone, has been the site of repeated surface-faulting earthquakes (of about magnitude 6.5 to 7). New research trenches in the area are helping geologists and seismologists untangle how this complex fault system ruptures and will aid in forecasting future earthquakes in the area. At the annual meeting of the...

Powerful 7.8 Magnitude Earthquake Rocks Southeastern Iran
2013-04-16 08:48:18

Lawrence LeBlond for redOrbit.com - Your Universe Online A powerful 7.8 magnitude earthquake struck southeastern Iran, near the Pakistan border this morning at about 10:45 GMT (3:15 p.m. local time). Iran´s state-operated Press TV cited reports that at least 40 people are feared dead. However, the latest report from The Guardian said that number could be in the hundreds. The Iranian Seismological Center initially put the magnitude at 7.5, but an updated measurement of 7.8 was...

Magma May Be Natural Lubricant For Moving Tectonic Plates
2013-03-21 11:09:11

redOrbit Staff & Wire Reports - Your Universe Online Scientists from the University of California, San Diego´s (UCSD) Scripps Institution of Oceanography (SIO) have discovered a liquefied layer of molten rock in the planet´s mantle — a substance which could be acting as a lubricant of the sliding motions of the Earth´s tectonic plates. The magma layer was discovered at the Middle America trench offshore Nicaragua during a 2010 expedition aboard the US Navy-owned...

Scientists Solve Mystery Of California Tectonics
2013-03-19 12:50:14

Brett Smith for redOrbit.com - Your Universe Online A team of American scientists believe they have solved a geological mystery buried about 100 miles below California. According to a report in the Proceedings of the National Academy of Sciences, geologists from Brown University, Columbia University, the University of Rhode Island and the University of Oregon identified the source of anomalous seismic readings as a fragment of the Farallon tectonic plate, which was pushed deep into the...

Space Seismometer Recorded Japan's 2011 Earthquake, Two Years Ago Today
2013-03-11 14:58:19

WATCH VIDEO: [Earthquake Sensed By GOCE] Lee Rannals for redOrbit.com — Your Universe Online Two years ago today, Japan was rocked by a 9.0-magnitude earthquake and giant tsunami that caused both death and destruction throughout the country. Now, with instrument's like the European Space Agency's (ESA) GOCE satellite, scientists will be able to understand a bit more about these devastating quakes and how they rock Earth. ESA launched the hyper-sensitive GOCE gravity satellite...

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...


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
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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