Posted on 07/09/2009 7:08:27 PM PDT by TaraP
LOS ANGELES – Scientists have detected a spike in underground rumblings on a section of California's San Andreas Fault that produced a magnitude-7.8 earthquake in 1857.
What these mysterious vibrations say about future earthquakes is far from certain. But some think the deep tremors suggest underground stress may be building up faster than expected and may indicate an increased risk of a major temblor.
Researchers at the University of California, Berkeley, monitored seismic activity on the fault's central section between July 2001 and February 2009 and recorded more than 2,000 tremors. The tremors lasted mere minutes to nearly half an hour.
Unlike earthquakes, tremors occur deeper below the surface and the shaking lasts longer.
(Excerpt) Read more at news.yahoo.com ...
Reminds me of the under-appreciated, underrated Kevin Bacon film “Tremors”.
Unlike earthquakes, tremors occur deeper below the surface and the shaking lasts longer.
During the study period, two strong earthquakes hit — a magnitude-6.5 in 2003 and a magnitude-6.0 a year later. Scientists noticed the frequency of the tremors doubled after the 2003 quake and jumped six-fold after 2004.
Tremor episodes persist today. Though the frequency of tremors have declined since 2004, scientists are still concerned because they are still at a level that is twice as high as before the 2003 quake.
The team also recorded unusually strong rumblings days before the 2004 temblor
The Fault, however, stretches north all the way to Seattle, running through the Puget Sound, where it is an over-and-under.
When the Cascadia Fault goes it could trigger the S.A. Fault, and Seattle would pretty much be a ruined city. I think the last time the Cascadia Fault gave way, 5 feet of landline was submerged and it created a tsunami that hit Japan.
It would be nice if we could evacuate any FReepers and other right minded folks, then let the God forsaken state fall off into the ocean.
It would literally be analogous to culling a dead limb on a tree as far as the country is concerned....
The upside is that if California falls into the ocean it won’t catch fire this year.
Jump into the fire if ya wanna be free yeah yeah yeah....
Harry Nielson for those who don’t know.
You make a good point!
Have Family in L.A. Also in S.F. and Medford Ore. Hope this isn’t a preview of the “Big One”.
I know..Will keep an eye out for updates on it...
Much of your food is grown in The Big Valley.
It’s also full of conservatives.
Ask Jim.
If you think a lot of folks are walking away from their mortgages due to the economy, just wait till 100’s of thousands of them are damaged or destroyed in quakes.
Even the “San Andreas Fault” is getting tired of hearing about Mikey Jackson.
Graboids!
Oh I know..One Big Quake or another Katrina Disaster, the housing market will be burnt toast!
Looks pretty active! From Oregon, to N. Ca to Channel Islands to San Diego....
Love Is A Burning Thing
And It Makes A Fiery Ring
Bound By Wild Desire
I Fell Into A Ring Of Fire
CHORUS:
I Fell Into A Burning Ring Of Fire
I Went Down, Down, Down
And The Flames Went Higher
And It Burns, Burns, Burns
The Ring Of Fire
The Ring Of Fire
I Fell Into A Burning Ring Of Fire
I Went Down, Down, Down
And The Flames Went Higher
And It Burns, Burns, Burns
The Ring Of Fire
The Ring Of Fire
The Taste Of Love Is Sweet
When Hearts Like Ours Meet
I Fell For You Like A Child
Oh, But The Fire Went Wild
CHORUS
I Fell Into A Burning Ring Of Fire
I Went Down, Down, Down
And The Flames Went Higher
And It Burns, Burns, Burns
The Ring Of Fire
The Ring Of Fire
I Fell Into A Burning Ring Of Fire
I Went Down, Down, Down
And The Flames Went Higher
And It Burns, Burns, Burns
The Ring Of Fire
The Ring Of Fire
And It Burns, Burns, Burns
The Ring Of Fire
The Ring Of Fire
(Confession - we own an old VHS tape of it and love it, my husband and I have watched it at least a dozen times!)
I forget what AC is like. (Hear that Al?)
Parkfield is at the northern end of a locked segment of the San Andreas Fault (SAF) that, in 1857, ruptured south from Monarch Peak (MP) in the great 7.8 magnitude Ft. Tejon quake. As a result of nearby earthquakes in 2003 and 2004, tremors developed under Cholame and Monarch Peak. The black dots pinpoint 1250 well-located tremors. The square boxes are 30 kilometers (19 miles) on a side.
Color contours give regional shear-stress change at 20 km depth from the Parkfield earthquake (green segment) along the SAF. The thrust-type San Simeon earthquake rupture is represented by the gray rectangle and line with triangles labeled SS. The currently locked Cholame segment is about 63 km long (solid portion of the arrow) and is believed capable of rupturing on its own in a magnitude 7 earthquake. The gray lines within the Cholame box bound the west quadrant, where quasiperiodic episodes predominate. (Robert Nadeau/UC Berkeley)
The seismic record of an earthquake consists of an initial P wave and bigger S wave, with vibrations tapering off in less than a minute. Tremors are a constant rumbling, like a continuous 0.5 magnitude earthquake, that can go on for 20 minutes or more. (Robert Nadeau/UC Berkeley)
"...We've shown that earthquakes can stimulate tremors next to a locked zone, but we don't yet have evidence that this tells us anything about future quakes," Nadeau said. "But if earthquakes trigger tremors, the pressure that stimulates tremors may also stimulate earthquakes."
Gotta love Johnny Cash
You ain’t alone.
:)
Ping
Good movie, first time I saw Reba act....a little campy but entertaining..
Thanks...
Didn't the libs shut off the water to save another minnow.
People have been talking about THE BIG ONE for years hitting California. If THE BIG ONE hits then the first thing we must do is not panic. In fact, panic in any natural disaster is the worst thing anybody can do. You try to stay calm and act rationally in the event of a natural disaster. You do your best to prepare for them as if they are imminent.
Nu the way, has anybody checked our what Lex Luthor is up to?
5.1 off the oregon coast, 16.5 miles deep about 4 hours ago.
I suggested evacuating FReepers and other 'right minded' people first.
Maybe THEY’LL fall off?
;-)
There’s still a lot of money changing hands. :-(
How far off the Oregon coast?
nononono!! The land is GOOD! Keep the land and scrape off the crap!
LOL!
‘Cept then all the oil, gold and other goodies locked up in the state (and that the touchy feelies won’t let us at now) would be gone too (not that it’s actually ever going to “fall off” or sink)...
Hmmm.I think 6.0 in Alaska yesterday as well....
I also think they had some swarms small ones just above San Francisco as well yesterday...
My Graboid friends and I appreciate it and the sequels and rate them highly!
:-) Hi, Randy!
It would literally be analogous to culling a dead limb on a tree as far as the country is concerned....”
California is probably more conservative than many states per capita. It has the 7th largest economy in the world. The largest ag economy in the nation, etc..
It is a great state with a few nut jobs; like most states.
I love the movie TREMORS. The sequels were OK but the original is still by far the best of the bunch.
Just a few nutjobs in California?
I don’t think so.
The place is riddled with em especially in the northern part of the state where they seem to be concentrated.
Now if San Francisco and Oakland were to fall into the sea because if a huge earthquake about the only thing I would miss would be the topless bars in SF.
If that happened, it might even be considered as some kind of retribution by the Almighty.
The biggest concentration of nutjobs in any state tend to be found in the larger cities. Proof positive that we weren’t meant to be stacked in cubes.
The wife’s looking at me funny now cause I won’t stop singing it.
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