felixthecat
April 6th, 2008, 12:04 AM
Seismic Faults 'Talk' to Each Other Before Earthquakes
Friday, April 04, 2008
By Andrea Thompson
...
(They are talking about an extensive fault that extends down the Pacific coast of North America to Northern California. They believe this could trigger the San Andreas Fault. Click on the link and see the picture. It's eye opening.)
...
The study, detailed in the April issue of the Bulletin of the Seismological Society of America, revealed that 13 out of 15 of the San Andreas earthquakes in the past 3,000 years occurred at almost the same time (in geological terms) as quakes along the southern portion of the Cascadia fault.
...
"It's either an amazing coincidence, or one fault triggered the other," Goldfinger said.
The Cascadia and San Andreas faults meet a third fault, the Mendocino, at a spot just off Cape Mendocino in California that Goldfinger describes as "a kind of plate tectonics oddity where three plates come together."
At this triple junction, seismologists have observed significant deformation and seismic activity.
Goldfinger told LiveScience that it's likely that whatever happens to one fault would affect the others. (domino effect)
This could happen because as an earthquake relieves stress in one part of a fault, stress can build up in other parts.
"Just like if you have a crack in a windshield, it will never get smaller; it will only get bigger," because the stress tends to concentrate on the crack, Goldfinger explained.
Click here to see the picture!
http://www.foxnews.com/story/0,2933,346729,00.html
Maybe someone can post the picture of the fault.
Friday, April 04, 2008
By Andrea Thompson
...
(They are talking about an extensive fault that extends down the Pacific coast of North America to Northern California. They believe this could trigger the San Andreas Fault. Click on the link and see the picture. It's eye opening.)
...
The study, detailed in the April issue of the Bulletin of the Seismological Society of America, revealed that 13 out of 15 of the San Andreas earthquakes in the past 3,000 years occurred at almost the same time (in geological terms) as quakes along the southern portion of the Cascadia fault.
...
"It's either an amazing coincidence, or one fault triggered the other," Goldfinger said.
The Cascadia and San Andreas faults meet a third fault, the Mendocino, at a spot just off Cape Mendocino in California that Goldfinger describes as "a kind of plate tectonics oddity where three plates come together."
At this triple junction, seismologists have observed significant deformation and seismic activity.
Goldfinger told LiveScience that it's likely that whatever happens to one fault would affect the others. (domino effect)
This could happen because as an earthquake relieves stress in one part of a fault, stress can build up in other parts.
"Just like if you have a crack in a windshield, it will never get smaller; it will only get bigger," because the stress tends to concentrate on the crack, Goldfinger explained.
Click here to see the picture!
http://www.foxnews.com/story/0,2933,346729,00.html
Maybe someone can post the picture of the fault.