Quantcast

Latest San Andreas Fault Stories

2009-11-23 09:43:37

Using a technique normally used for detecting weak tremors, scientists at the Georgia Institute of Technology discovered that the 2004 magnitude 6 earthquake along the Parkfield section of the San Andreas fault exhibited almost 11 times more aftershocks than previously thought.  The research appears online in Nature Geoscience and will appear in print in a forthcoming edition. "We found almost 11 times more events in the first three days after the main event. That's surprising because...

d677d44390bda5cde45a2b80f1e9bbec
2009-11-09 07:38:14

With an average of four mini-earthquakes per day, Southern California's San Jacinto fault constantly adjusts to make it a less likely candidate for a major earthquake than its quiet neighbor to the east, the Southern San Andreas fault, according to an article in the journal Nature Geoscience. "Those minor to moderate events along the San Jacinto fault relieve some of the stress built by the constantly moving tectonic plates," said Shimon Wdowinski, research associate professor at the...

77abfc08d4920220933937592c949eae
2009-11-05 12:45:00

Scientists say many recent earthquakes might have been the aftershocks of large quakes that occurred hundreds of years ago, BBC News reported. Researchers have described a new pattern in the frequency of aftershocks that could explain some major quakes. A report published in the journal Nature found that, away from plate boundaries, echoes of past earthquakes could continue for several hundred years, since the earth takes longer to recover in the middle of a continent. Seth Stein from...

2009-10-05 12:46:11

U.S. scientists studying the giant 2004 earthquake that caused Indian Ocean tsunamis say they've determined the quake weakened part of the San Andreas Fault. The seismologists said their findings suggest the Earth's largest earthquakes can weaken fault zones worldwide and might trigger periods of increased global seismic activity. An unusually high number of magnitude 8 earthquakes occurred worldwide in 2005 and 2006, said Rice University Associate Professor Fenglin Niu, one of the study's...

dd229fdbf5a94ce6af6324fe4245b3ad
2009-10-01 06:35:00

Researchers at the Carnegie Institution say that they have discovered a method of measuring and monitoring geological fault lines beneath the Earth's crust"”a development that could significantly enhance scientists' ability to accurately predict earthquakes. Geologists previously had no means with which to detect and measure the fluctuating strength of faults that are hidden beneath the Earth's surface.  Now, however, researchers from the Carnegie Institution's Department of...

c4d01aa100a9f0d9a7f55d9fec7841ee
2009-08-05 14:24:51

New Zealand is the site of one of the world's youngest subduction zones, where the Pacific Plate of Earth's crust dives beneath the Australian Plate. Now, a University of Utah study shows how water deep underground helps the subduction zone mature and paves the way for it to generate powerful earthquakes.The study in the Aug. 6 issue of the journal Nature "expands our understanding of the sources of earthquake failure," says Phil Wannamaker, the study's main author and a geophysicist at the...

2009-07-10 09:49:26

Tremors deep within the San Andreas Fault suggest California should not become complacent about future earthquakes, a leading seismologist said. The San Andreas fault is changing down deep and it's changing down deep in places where large earthquakes have happened in the past, said Robert Nadeau, a research seismologist at the University of California, Berkeley. Seismic activity in the central part of the fault has increased in the years since the magnitude 6.5 San Simeon quake in 2003 and...

f01143708e304d3c4357b6b3c48d54431
2009-07-10 06:25:00

A spike in mysterious underground rumblings observed on a section of the San Andreas fault near Parkfield, California, could indicate a build-up of stress and an increased likelihood of a major earthquake, said scientists at the University of California, Berkeley. The researchers monitored seismic activity along a heavily instrumented segment of the central San Andreas Fault from July 2001 to February 2009, and recorded more than 2,000 tremors lasting from minutes to nearly half an hour....

91574e7a855226b810c568be42992a821
2009-06-17 12:15:00

When a swarm of hundreds of small to moderate earthquakes erupted beneath California's Salton Sea in March, sending spasms rumbling across the desert floor, it set off more than just seismometers. It also raised the eyebrows of quite a few concerned scientists. The reason: lurking underground, just a few kilometers to the northeast, lays a sleeping giant: the 160-kilometer-(100-mile) long southern segment of the notorious 1,300-kilometer- (800-mile) long San Andreas fault. Scientists were...

2009-03-25 13:01:07

A series of small earthquakes like the ones that have shaken Southern California this week has a 5 percent chance of triggering a major quake, experts say. The tremors have occurred in the Salton Sea area east of San Diego, The San Diego Union-Tribune reports. Most have been too small to feel but a temblor early Tuesday measured 4.8 on the Richter scale, big enough to be felt and heard, although unlikely to cause damage. The area is near the southern end of the San Andreas Fault, Neal...


Word of the Day
siliqua
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'
Related