| Topic: |
Science > Prophecies-Of-Nostradamus |
| User: |
"=?utf-8?B?wr9Xb3JsZCBXYXIgSUlJIDIwMDYgLsK3OirCqMKoKjrCty4gIFtUaGUgTGFzdCAyMzAwIERheXNdLsK3OirCqMKoKjrCty4g4pmlwq7ihKIuwrc6KsKowqgqOsK3Li7CtzoqwqjCqCo6wrcuICAuwrc6KsKowqgqOsK3Lg==?=" |
| Date: |
22 Jun 2006 01:52:33 AM |
| Object: |
yeppers !! yes siree yes indeedy do !!! Study: San Andreas fault overdue for quake |
Study: San Andreas fault overdue for quake
By ALICIA CHANG, AP Science Writer
Wed Jun 21, 6:14 PM ET
New earthquake research confirms the southern end of the San Andreas
fault near Los Angeles is overdue for a Big One. The lower section of
the fault has not produced a major earthquake in more than three
centuries.
The new study, which analyzed 20 years of data and is considered one of
the most detailed analyses yet, found that stress has been building up
since then, and that the fault could rupture at any moment.
"The southern section of the fault is fully loaded for the next big
event," said geophysicist Yuri Fialko of the Scripps Institution of
Oceanography in La Jolla.
Predicting exactly when that might happen, however, is beyond
scientists' ability.
The analysis was published in Thursday's issue of the journal Nature.
Experts have estimated that a quake on the southern San Andreas of
magnitude-7.6 or greater could kill thousands of people in the densely
populated greater Los Angeles area and cause tens of billions of
dollars in damage.
It was the 800-mile San Andreas fault, which runs down California like
a scar, that caused the 1906 San Francisco earthquake that led to about
3,000 deaths.
But scientists know very little about the 100-mile dormant southern
segment, which slices through Southern California from San Bernardino,
east of Los Angeles, to near the Mexican border.
The section last popped in 1690, producing an estimated 7.7-magnitude
quake, but caused little injury or damage because hardly anyone lived
there at the time.
Using satellite radar and global positioning data, Fialko measured the
movement of the southern San Andreas between 1985 and 2005. Small
movements along a fault can relieve strain. Calculating those subtle
motions allows scientists to figure out how much strain is building up.
Fialko found that the southern end of the fault has shown little
movement and that significant strain is building up. The fault's slip
rate, or average annual movement, was measured to be about an inch a
year =E2=80=94 similar to previous estimates.
Surprisingly, Fialko found the two sides of the southern San Andreas
behaved differently, with one side showing more flexibility than the
other. This could help scientists understand potential earthquake
risks, he said.
Ken Hudnut, a U.S. Geological Survey geophysicist in Pasadena, who had
no role in the study, said the latest research reaffirms the need to
study the mysterious southern San Andreas more closely.
In the fall, Hudnut will head a $240,000 project that would conduct
tests on the southern segment to get a better idea of the threat it
poses.
___
On the Net:
U=2ES. Geological Survey: http://www.usgs.gov
Scripps Institution of Oceanography: http://www.sio.ucsd.edu
.
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| User: "John Lemke" |
|
| Title: Re: yeppers !! yes siree yes indeedy do !!! Study: San Andreas fault overdue for quake |
22 Jun 2006 06:12:55 AM |
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Good post, Wally. :-)
Nice to see different reports on the same subject. Gives a broader
perspective.
HOOROO!!!!!!!!
"¿World War III 2006 .·:*¨¨*:·. [The Last 2300 Days].·:*¨¨*:·.
?®T.·:*¨¨*:·..·:*¨¨*:·. .·:*¨¨*:·." <stargatedecember2012@yahoo.ca> wrote in
message news:1150959153.342297.276010@y41g2000cwy.googlegroups.com...
Study: San Andreas fault overdue for quake
By ALICIA CHANG, AP Science Writer
Wed Jun 21, 6:14 PM ET
New earthquake research confirms the southern end of the San Andreas
fault near Los Angeles is overdue for a Big One. The lower section of
the fault has not produced a major earthquake in more than three
centuries.
The new study, which analyzed 20 years of data and is considered one of
the most detailed analyses yet, found that stress has been building up
since then, and that the fault could rupture at any moment.
"The southern section of the fault is fully loaded for the next big
event," said geophysicist Yuri Fialko of the Scripps Institution of
Oceanography in La Jolla.
Predicting exactly when that might happen, however, is beyond
scientists' ability.
The analysis was published in Thursday's issue of the journal Nature.
Experts have estimated that a quake on the southern San Andreas of
magnitude-7.6 or greater could kill thousands of people in the densely
populated greater Los Angeles area and cause tens of billions of
dollars in damage.
It was the 800-mile San Andreas fault, which runs down California like
a scar, that caused the 1906 San Francisco earthquake that led to about
3,000 deaths.
But scientists know very little about the 100-mile dormant southern
segment, which slices through Southern California from San Bernardino,
east of Los Angeles, to near the Mexican border.
The section last popped in 1690, producing an estimated 7.7-magnitude
quake, but caused little injury or damage because hardly anyone lived
there at the time.
Using satellite radar and global positioning data, Fialko measured the
movement of the southern San Andreas between 1985 and 2005. Small
movements along a fault can relieve strain. Calculating those subtle
motions allows scientists to figure out how much strain is building up.
Fialko found that the southern end of the fault has shown little
movement and that significant strain is building up. The fault's slip
rate, or average annual movement, was measured to be about an inch a
year - similar to previous estimates.
Surprisingly, Fialko found the two sides of the southern San Andreas
behaved differently, with one side showing more flexibility than the
other. This could help scientists understand potential earthquake
risks, he said.
Ken Hudnut, a U.S. Geological Survey geophysicist in Pasadena, who had
no role in the study, said the latest research reaffirms the need to
study the mysterious southern San Andreas more closely.
In the fall, Hudnut will head a $240,000 project that would conduct
tests on the southern segment to get a better idea of the threat it
poses.
___
On the Net:
U.S. Geological Survey: http://www.usgs.gov
Scripps Institution of Oceanography: http://www.sio.ucsd.edu
.
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