PSN-L Email List Message
Subject: Re: Arkansas quakes
From: Canie canie@...........
Date: Wed, 05 Oct 2011 18:54:50 -0700
That segment of the fault is always moving - it's 'well oiled' - but
it still does increase the stress in the area at the 'ends' where the
fault isn't likely to creep along - where it's locked and it will all
release in a big quake shortly..
the little quakes are where the land is moving a little bit -
increases the stress on the land around that spot - The InSAR
graphics can show that the best..
After a large quake, the smaller shocks are the land adjusting to the
new position of the blocks around the fault - before, it's just buildup.
Canie
At 06:50 PM 10/5/2011, you wrote:
> And just how would these small quakes be increasing stress? If
> one uses Holliser, CA as an example, the small quakes and fault
> creep reduces stress build up. It does not increase the stress.
>
>On 10/5/2011 12:06 PM, Canie wrote:
>>It would take 27,000 magnitude 3's to relieve the stress of a mag
>>5..it would take 729 MILLION magnitude 3s to relieve a magnitude 8..
>>
>>The only thing these smaller quakes do is to actually raise the
>>stress levels..
>>
>>Canie
>>
>>At 08:02 AM 10/5/2011, you wrote:
>>>Probably not. The release of energy in small amounts, by whatever
>>>cause, probably is good as it relieves stress. Remember, there
>>>were some BIG earthquakes in the New Madrid area between December
>>>1811 and February 1812.
>>>If petroleum exploration and extraction is the cause of these
>>>seismic events, it is probably doing a great service to the area.
>>>by relieving stress in small increments.
>>
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