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Latest Seismology Stories

Georgia Basin May Amplify Ground Shaking From Next Quake In Vancouver
2014-01-21 08:15:38

Seismological Society of America Tall buildings, bridges and other long-period structures in Greater Vancouver may experience greater shaking from large (M 6.8 +) earthquakes than previously thought due to the amplification of surface waves passing through the Georgia basin, according to two studies published by the Bulletin of the Seismological Society of America (BSSA). The basin will have the greatest impact on ground motion passing over it from earthquakes generated south and southwest...

NASA JPL Scientist Reflects Last Big Quake In Los Angeles
2014-01-17 09:14:01

NASA's Jet Propulsion Laboratory Twenty years ago this week, in the predawn darkness of Jan. 17, 1994, at five seconds before 4:31 a.m. PST, the ground ruptured violently on a blind thrust fault (a crack in Earth's crust that does not reach the surface) about 11 miles (18 kilometers) beneath Reseda, in California's San Fernando Valley about 20 miles (31 kilometers) northwest of downtown Los Angeles. The resulting magnitude 6.7 earthquake, known as the Northridge earthquake, became the...

2014-01-14 12:22:30

HOUSTON, Jan. 14, 2014 /PRNewswire/ -- ESG Solutions, an industry leader in microseismic technology and services, successfully conducted multiple hydraulic fracture monitoring projects within North America using its patented Hybrid(TM) Seismic Sensor Network. The innovative approach integrates traditional downhole microseismic with surface and near-surface based induced seismicity (IS) arrays to accurately evaluate large and small-scale seismicity in one comprehensive system....

Researchers Develop Building 'Belt' For Cheap, Quick Repair Of Earthquake Damage
2014-01-14 07:25:34

University of Sheffield [ Watch The Video: Earthquake Test Checks Out Building Vulnerability ] Four years after the January 2010 earthquake, 145,000 people still remain homeless in Haiti. A cheap and simple technology to repair earthquake damaged buildings – developed at the University of Sheffield – could help to reduce these delays by quickly making buildings safe and habitable. Recent tests showed that a damaged building repaired using the technique could withstand a major...

2014-01-13 23:23:22

California felt 110 earthquakes during 2013 in the 3.0-6.0 magnitude range. With the largest being only a 5.7, California is still waiting for another big one. Bay Area, CA (PRWEB) January 13, 2014 WorkSafe Technologies of Northern California says goodbye to 2013 and hello to 2014. WorkSafe continues to be the premier "base isolation" solution provider for IT server locations in seismically active zones through installation of the patented Iso-Base™ seismically isolated...

Natural Disasters Were Rampant In 2013, Creating Widespread Chaos
2014-01-09 10:57:50

Gerard LeBlond for redOrbit.com - Your Universe Online Natural disasters were rampant in 2013, causing wide spread damage, chaos and impacting millions of lives. In a report from CBC News, German insurance company Munich Re, said that there were about 880 major natural disasters around the world in 2013. According to the insurance company 20,000 people’s lives came to a tragic end, which was more than double that of 2012, and with an estimated cost of $125 billion dollars in damage --...

Utah Copper Mine Landslide Triggered Earthquakes
2014-01-06 07:39:40

University of Utah Record-breaking slide would bury Central Park 66 feet deep Last year's gigantic landslide at a Utah copper mine probably was the biggest nonvolcanic slide in North America's modern history, and included two rock avalanches that happened 90 minutes apart and surprisingly triggered 16 small earthquakes, University of Utah scientists discovered. The landslide – which moved at an average of almost 70 mph and reached estimated speeds of at least 100 mph – left a...

Multi-Study Focuses On Link Between Lushan, Wenchuan Earthquakes
2014-01-03 09:30:34

April Flowers for redOrbit.com - Your Universe Online New research, published in Seismological Research Letters, suggests that the 32-mile segment of the fault northeast of the 2013 Lushan rupture is the place to watch for the next major earthquake in the region. Papers published in the special section of the journal suggest that the 2008 Wenchuan earthquake triggered the magnitude M6.6 Lushan quake. Huajian Yao, professor of geophysics at the University of Science and Technology of...

Subvertical Faults Can Create Electrical Light Shows During Earthquakes
2014-01-03 05:56:52

April Flowers for redOrbit.com - Your Universe Online A new study, published in Seismological Research Letters, reveals that rare earthquake lights are more likely to occur on or near rift environments. These environments are where subvertical faults allow stress-induced electrical currents to flow rapidly to the surface. Scholars have been intrigued by the luminous phenomena known as earthquake lights (EQL) since the earliest days of seismology. EQL appear before or during earthquakes,...

Runaway Earthquakes Helped By High Pressure Heating
2013-12-25 05:01:27

Brett Smith for redOrbit.com - Your Universe Online Almost one quarter of all earthquakes start in the lithosphere, a slice of the Earth about 31 miles below the surface. In a new study published by the journal Geophysical Research Letters, scientists revealed the discovery of a mechanism that helps deep rumblings in the lithosphere spread into larger quakes. Using seismic data from a region in Colombia known for its lithosphere-generated earthquakes, study researchers from MIT and...


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
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'