About three years ago, I lived near Springdale, AR (NW AR.).  The area there 
is mostly limestone & shale.  There are many caves throughout Arkansas.  In 
fact, there were a couple of isolated quakes near Cave Springs, AR in that 
area.

However, I do not know what the bedding is in NE Arkansas.  I do not believe 
it is igneous.  Maybe there are geology maps online for Faulkner County, AR.
Jerry

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

  ----- Original Message ----- 
  From: Thomas Dick
  To: psnlist@..............
  Sent: Sunday, November 21, 2010 8:58 AM
  Subject: Re: Guy and fracking


  On 11/21/2010 8:42 AM, Timothy Carpenter wrote:
  > More on induced earthquakes:
  > http://geology.geoscienceworld.org/cgi/content/abstract/16/8/739
  > Regards,
  > -Tim-
  > Timothy Carpenter
  >
  > -----Original Message-----
  > From: psnlist-request@.............. 
[mailto:psnlist-request@...............
  > On Behalf Of Thomas Dick
  > Sent: Saturday, November 20, 2010 9:31 AM
  > To: psnlist@..............
  > Subject: Re: Guy and fracking
  >
  > My wife asked this question and I am not sure I know the answer,,,,could
  > we be detecting a fracturing event or just an earthquake caused by the
  > process?...in other words would the signature be different?
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  >
  Interesting...isn't that igneous base rock in that area? The trend of
  these microquakes is increased magnitude...in the last three days only
  one quake is listed below mag two while mag 2.4 seems average...trend
  seems upward in numbers again after a slack period about two weeks ago.
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About three years ago, I lived near Springdale, AR (NW AR.).  =
The area=20
there is mostly limestone & shale.  There are many caves =
throughout=20
Arkansas.  In fact, there were a couple of isolated quakes near =
Cave=20
Springs, AR in that area.
 
However, I do not know what the bedding is in NE Arkansas.  I =
do not=20
believe it is igneous.  Maybe there are geology maps online for =
Faulkner=20
County, AR.
Jerry




  
----- Original Message ----- 
  From:=20
  Thomas Dick 
  
To: psnlist@.............. =

  
Sent: Sunday, November 21, 2010 =
8:58=20
  AM
  
Subject: Re: Guy and =
fracking
  

On 11/21/2010 8:42 AM, Timothy Carpenter wrote:
> =
More on=20
  induced earthquakes:
> http://geology.geoscienceworld.org/cgi/content/abstract/16/8/739
=
>=20
  Regards,
> -Tim-
> Timothy Carpenter
>
> =
-----Original=20
  Message-----
> From: psnlist-request@webtronics=
..com=20
  [mailto:psnlist-request@...............
> On Behalf Of Thomas=20
  Dick
> Sent: Saturday, November 20, 2010 9:31 AM
> To: psnlist@..............
>=
=20
  Subject: Re: Guy and fracking
>
> My wife asked this =
question and=20
  I am not sure I know the answer,,,,could
> we be detecting a =
fracturing=20
  event or just an earthquake caused by the
> process?...in other =
words=20
  would the signature be different?
>=20
  =
__________________________________________________________
>
>=
;=20
  Public Seismic Network Mailing List (PSNLIST)
>
> To leave =
this=20
  list email PSNLIST-REQUEST@SEISMICNET=
..COM=20
  with
> the body of the message (first line only): =
unsubscribe
>=20
  See http://www.seismicnet.co=
m/maillist.html=20
  for more information.
>
>=20
  =
__________________________________________________________
>
>=
;=20
  Public Seismic Network Mailing List (PSNLIST)
>
> To leave =
this=20
  list email PSNLIST-REQUEST@SEISMICNET=
..COM=20
  with
> the body of the message (first line only): =
unsubscribe
>=20
  See http://www.seismicnet.co=
m/maillist.html=20
  for more information.
>
Interesting...isn't that igneous base =
rock in=20
  that area? The trend of 
these microquakes is increased =
magnitude...in the=20
  last three days only 
one quake is listed below mag two while mag =
2.4 seems=20
  average...trend 
seems upward in numbers again after a slack period =
about=20
  two weeks=20
  =
ago.
__________________________________________________________
Public=20
  Seismic Network Mailing List (PSNLIST)

To leave this list email =
PSNLIST-REQUEST@SEISMICNET=
..COM=20
  with 
the body of the message (first line only): unsubscribe
See =
http://www.seismicnet.co=
m/maillist.html=20
  for more information.