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Windows 7: Oklahoma Earthquake?

05 Nov 2011   #11
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

In relatively small earthquakes that is correct, in fact what is happening is a series of invidual small quakes. In major earthquakes the energy is released very suddenly when the fault planes can no longer contain the stress built up in the rocks on either side of them. The sudden release of energy is what makes earthquakes so damaging.
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05 Nov 2011   #12
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Maybe I have been watching too much TV, but I thought that was the point of having seismic stations monitoring known areas...to provide a warning of a major quake by reading the lesser ones that might lead up to the big one.
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05 Nov 2011   #13
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

Thats the theory......but the link between smaller quakes and large ones is not yet proven, especially in areas prone to earthquake actvity (e.g. Japan, New Zealand, west coast of the US which all lie on or close too the Pacific plate boundary). If we could predict them, we could have avoided the devastation and loss of life as occurred in the recent earthquake off the coast of Japan.
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05 Nov 2011   #14
Airbot

Windows 7 Ultimate x64 SP1
 
 

Larger earthquakes can have "foreshocks" leading up to the larger event. Depends on the type of fault line, and it's movement. They're not all just of one type. It's not a certainty of "no, they never will have them".

Foreshock
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05 Nov 2011   #15
Brink

64-bit Windows 10 Pro
 
 

Quote   Quote: Originally Posted by Airbot View Post
Just been upgraded to a 5.6

Epicenter: Sparks, OK
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06 Nov 2011   #16
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

I don't imagine that my distance makes me safe, but I'm glad that I don't live in Sparks. I wonder what kind of damage that they might have had?
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06 Nov 2011   #17
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

On the Richter Scale, it might be a minor quake, but it is the strongest one ever reported in Oklahoma:

5.6 magnitude earthquake shakes Oklahoma | NewsOK.com
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06 Nov 2011   #18
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

Quote   Quote: Originally Posted by Airbot View Post
Larger earthquakes can have "foreshocks" leading up to the larger event. Depends on the type of fault line, and it's movement. They're not all just of one type. It's not a certainty of "no, they never will have them".
Foreshock
Unfortunately, foreshocks aren't reliable methods of predicting a major quake event, hence they are largely disregarded, especially in areas where quakes pose hazards, such as areas on the Pacific plate boundary where foreshocks can be a daily occurence. It would not be practical for evacuations to happen every time a minor quake is classified as a foreshock - in some places this could be weekly, possibly even daily.
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06 Nov 2011   #19
Airbot

Windows 7 Ultimate x64 SP1
 
 

Personally never mentioned foreshocks being a valid method of prediction. Merely was a counter to "In a major earthquake there are no small precursor quakes", which isn't entirely an absolute.
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06 Nov 2011   #20
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

I'm not wishing to start an argument, just adding more to the discussion Airbot. I'm a geologist by profession so just trying to add some of my insight into a topic that is of interest to me.

Regards,
Golden
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