No problem.  As I said, it is just my uneducated "guess", at its best.  I 
found the article interesting in that I had noticed the EQ's mostly occurred 
inland from the ridge, as well as the mountain building aspect.

I think I would be a little nervous too, if I lived that close to the San 
Andreas fault.  But, short of moving, what can you do?

Best Regards,
Jerry

  ----- Original Message ----- 
  From: George Bush
  To: psn-l@..............
  Sent: Monday, July 19, 2010 10:21 AM
  Subject: Re: What are the implications of a M2.8 quake near the San 
Andreas fault?


  Jerry-

  Thanks for the thought, I think I have detected more small quakes from 
off-shore than from small faults on the other side of the San Andreas fault 
that are on-shore.

  George

  At 02:58 PM 7/18/2010, you wrote:

    Hi George,

    I will do a flimsy attempt in answering you question.  Yesterday, I 
received the August issue of  EARTH magazine with contained a sort article 
about the Nazca Plate adjacent to Peru.  The article was titled Peruvian 
Plates Move With and Without Earthquakes.

    If I understood the article correctly, it was asking the question as to 
why a block of the plate might move seismic and another part generate an 
earthquake.  It pointed out that the majority of the earthquakes occur 
inland and not actually off shore at the subducting ridge itself.

    In humble opinion, that may be because of lubrication from the seawater, 
which would be less and less at the wedge-shaped plated subducted underneath 
the South American Plate.  THAT is strictly a guess on my part, as I have NO 
technical training in geology or seismology!

    In regard to your question, I would think the same process "may" be in 
play there and there may or may not be a direct interaction, who knows.  One 
might think that jostling a already stressed block might cause it to 
release; and again it might just lessen the stress.

    I'd be interested in others opinions.  Who knows, I might learn 
something........Naaaaaa.

    Regards,
    Jerry

----------------------------------------------------------------------------

      ----- Original Message ----- 

      From: George Bush

      To: psn-l@..............

      Sent: Sunday, July 18, 2010 4:32 PM

      Subject: What are the implications of a M2.8 quake near the San 
Andreas fault?


      Hello-


      This morning we had a M2.8 quake about 4 miles west of us out in the

      ocean and about 5 miles from the San Andreas fault that runs to the

      East of us. It was on a minor fault that runs parallel to the San

      Andreas. The shock knocked my data acquisition computer off-line, but

      was strong enough to jiggle the pen on my drum recorder that also was 
off line!


      I am wondering if the movement of the minor fault will add strain or

      relieve strain on the San Andreas fault (add or decrease the chances

      of the San Andreas fault letting-go).


      I would appreciate any thoughts or opinions on this from you PSN 
folks.



      George Bush

      Sea Ranch, CA, USA

      38.73775N, 123.48882W


      __________________________________________________________


      Public Seismic Network Mailing List (PSN-L)


      To leave this list email PSN-L-REQUEST@.............. with

      the body of the message (first line only): unsubscribe

      See http://www.seismicnet.com/maillist.html for more information.


  George 







No problem.  As I said, it is just my uneducated "guess", at =
its=20
best.  I found the article interesting in that I had noticed the =
EQ's=20
mostly occurred inland from the ridge, as well as the mountain building=20
aspect.  
 
I think I would be a little nervous too, if I lived that close to =
the San=20
Andreas fault.  But, short of moving, what can you do?
 
Best Regards,
Jerry
 

  
----- Original Message ----- 
  From:=20
  George =
Bush 
  
To: psn-l@.............. 
  
Sent: Monday, July 19, 2010 =
10:21=20
AM
  
Subject: Re: What are the =
implications of=20
  a M2.8 quake near the San Andreas fault?
  

Jerry-

Thanks for the thought, I think I have =
detected=20
  more small quakes from off-shore than from small faults on the other =
side of=20
  the San Andreas fault that are on-shore.

George

At 02:58 =
PM=20
  7/18/2010, you wrote:

  
Hi =
George,
 
I will do=20
    a flimsy attempt in answering you question.  Yesterday, I =
received the=20
    August issue of  EARTH magazine with contained a sort article =
about the=20
    Nazca Plate adjacent to Peru.  The article was titled =
Peruvian=20
    Plates Move With and Without Earthquakes.
 
If I =
understood=20
    the article correctly, it was asking the question as to why a block =
of the=20
    plate might move seismic and another part generate an =
earthquake.  It=20
    pointed out that the majority of the earthquakes occur inland and =
not=20
    actually off shore at the subducting ridge itself.
 
In =
humble=20
    opinion, that may be because of lubrication from the seawater, which =
would=20
    be less and less at the wedge-shaped plated subducted underneath the =
South=20
    American Plate.  THAT is strictly a guess on my part, as I have =
NO=20
    technical training in geology or seismology!
 
In regard =
to your=20
    question, I would think the same process "may" be in play there and =
there=20
    may or may not be a direct interaction, who knows.  One might =
think=20
    that jostling a already stressed block might cause it to release; =
and again=20
    it might just lessen the stress.
 
I'd be interested in =
others=20
    opinions.  Who knows, I might learn=20
    something........Naaaaaa.
 
Regards,
Jerry

    


    

      
----- Original Message ----- 

      
From: George Bush =


      
To: psn-l@..............=20
      

      
Sent: Sunday, July 18, 2010 4:32 PM

      
Subject: What are the implications of a M2.8 quake near =
the San=20
      Andreas fault?


      
Hello-


      
This morning we had a M2.8 quake about 4 miles west of us out =
in the=20
      

      
ocean and about 5 miles from the San Andreas fault that runs =
to the=20
      

      
East of us. It was on a minor fault that runs parallel to the =
San 

      
Andreas. The shock knocked my data acquisition computer =
off-line, but=20
      

      
was strong enough to jiggle the pen on my drum recorder that =
also was=20
      off line!


      
I am wondering if the movement of the minor fault will add =
strain or=20
      

      
relieve strain on the San Andreas fault (add or decrease the =
chances=20
      

      
of the San Andreas fault letting-go).


      
I would appreciate any thoughts or opinions on this from you =
PSN=20
      folks.



      
George Bush

      
Sea Ranch, CA, USA

      
38.73775N, 123.48882W 


      =
__________________________________________________________


      
Public Seismic Network Mailing List (PSN-L)


      
To leave this list email PSN-L-REQUEST@...............
=20
      with 

      
the body of the message (first line only): unsubscribe

      
See http://www.seismicnet.co=
m/maillist.html=20
      for more information.

  

  
George