Posted on 12/23/2009 3:30:56 PM PST by decimon
WASHINGTON (Reuters) – Tidal forces parallel to a segment of the San Andreas Fault in central California may be causing non-volcanic tremors that could help predict earthquakes, researchers said on Wednesday.
Low-level tremors have long been associated with volcanoes, because they often warn of impending eruptions.
A study published in the journal Nature says these tremors beneath the San Andreas Fault could provide similar clues about earthquakes.
The researchers say the faint tug of the sun and the moon on the fault causes tremors well below the level where earthquakes occur.
The finding suggests that rock far underground is lubricated with pressurized water, allowing the rock to slip easily and weakening the fault.
(Excerpt) Read more at news.yahoo.com ...
Astro glide ping.
You're gonna need alot of it.
The finding suggests that rock far underground is lubricated with pressurized water, allowing the rock to slip easily and weakening the fault.
yup :)
Northridge was my "big one", and I don't need a repeat.
Congress will fix it.
It's NOT the sun or the moon. Those aren't even in the models.
It's CO2, and yes, it's causing all the evils in the world.
Also, it's Bush's fault.
Didn't that stuff go out in the 70's?
I still get chills when I remember the night the Devil had a Nightmare under Northridge. But unfortunately for us, it's the south end of the San Andreas that's historically long overdue for a huge shake.
San Andreas specialist at Caltech, Kerry Sieh, has learned that 12 great quakes have occurred on the south-central part of the fault in the past 2K years or so. The intervals average 145 years. The last was in 1857 near Tejon Pass outside L.A., when the fault shifted 30 linear feet -- further than it moved in the '06 S.F. quake.
Let's see...1857 + 145 = hmmmmmm. California's going to hell anyhow. Maybe I can sell out in time to find a nice place in Texas.
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The San Andreas runs about 10 miles North of where I live. The danger areas seem to be on the Southern end where there a lot of activity and the section between Ft. Tejon to Parkfield which seems to be locked hard.
naw it was swazanagger... hell who can spell that? not geeting his way so he made it up...lol
Seems to me that the sun and the moon are ALWAYS present... so how do we test this finding to falsify it? Oh, right, we can't.
My alternate theory is that when the number of homosexuals in San Fransisco doing their thing reaches a critical percentage above the number of heterosexuals doing their thing in Kalamazoo, Michigan, the San Andreas fault will slip a percentage equal to the ratio of female emperor penguins to male emeperor penguins in the San Francisco Zoo divided by the number of Van Gogh paintings in the Louvre that have been restored prior to 2002. That might be testable...
excerpt:
Sunspots and Earthquakes
Civilization's interest in predicting the location and time of damaging earthquakes is obvious. The potential for devastation of property that otherwise could be secured, and the loss of life that otherwise could be prevented, are powerful reasons to find predictive factors.
Some scientists have become aware of a correlation between sunspots and Earthquakes and want to use the sunspot data to help predict earthquakes. The theory is that an intensification of the magnetic field can cause changes in the geo-sphere. The NASA and the European Geosciences Union have already put their stamp of approval on the sunspot hypothesis, which suggests that changes in the sun-earth environment affects the magnetic field of the earth that can trigger earthquakes in areas prone to it. It is not clear how such a trigger might work.
In the Journal of Scientific Exploration, Vol. 17, No. 1, pp. 37–71, 2003, there is an excellent report that addresses the more down-to-earth problems facing geophysicists trying to understand earthquakes. The paper is titled, Rocks That Crackle and Sparkle and Glow: Strange Pre-Earthquake Phenomena, by Dr. Friedemann T. Freund...
SAN FRAN RADAR IMAGE NASA.
Thanks, Fred... I needed that. Some logic was required in this thread.
Some school teacher in Ferndale Calif figured this out years ago. In his case it was the high surf we get here on the north coast. I just read about in the local Historical Newsletter. He built his own seismograph to record earthquakes and the USGS heard about it and gave him a real live machine in exchange for his reporting. I think I still have the article but I doubt it is on line...
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