Kay I "think" it may be a demo of a LOVE Wave.  See the animations:
http://www.tjhsst.edu/~jlafever/wanimate/Wave_Properties2.html

Jerry
  ----- Original Message ----- 
  From: Kay Wyatt
  To: psnlist@..............
  Sent: Wednesday, September 08, 2010 5:57 PM
  Subject: Question about John Lahr's work


  Dear friends,

  John Lahr's wife, Jan, gave me much of John's earthscience activities and
  experiements.  I'm familiar with most of them, but there is one in
  particular that I could use some help on.  I have posted some pictures at
  http://www.oregonshakes.com/temp/Lahr/ for your review.

  The device appears to be a torsion wave generator but I'm not familiar 
with
  torsion waves generated by earthquakes (which was John's primary focus).
  Could this be something else related to earthquakes?

  Be sure to look at the move link on the website so that you can see it in
  action.
  http://www.oregonshakes.com/temp/Lahr/MOV04260a.MPG

  If any of you have ideas, please let me know.

  Thanks so much,
  Kay Wyatt


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  Public Seismic Network Mailing List (PSNLIST)

  To leave this list email PSNLIST-REQUEST@.............. with
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Kay I "think" it may be a demo of a LOVE Wave.  See the=20
animations:  
h=
ttp://www.tjhsst.edu/~jlafever/wanimate/Wave_Properties2.html
 
Jerry

  
----- Original Message ----- 
  From:=20
  Kay Wyatt=20
  
  
To: psnlist@.............. =

  
Sent: Wednesday, September 08, =
2010 5:57=20
  PM
  
Subject: Question about John =
Lahr's=20
  work
  

Dear friends,

John Lahr's wife, Jan, gave me =
much of=20
  John's earthscience activities and 
experiements.  I'm =
familiar with=20
  most of them, but there is one in 
particular that I could use some =
help=20
  on.  I have posted some pictures at 
http://www.oregonshakes.c=
om/temp/Lahr/=20
  for your review.

The device appears to be a torsion wave =
generator but=20
  I'm not familiar with 
torsion waves generated by earthquakes =
(which was=20
  John's primary focus). 
Could this be something else related to=20
  earthquakes?

Be sure to look at the move link on the website so =
that=20
  you can see it in 
action.
http://www.o=
regonshakes.com/temp/Lahr/MOV04260a.MPG

If=20
  any of you have ideas, please let me know.

Thanks so =
much,
Kay=20
  =
Wyatt


________________________________________________________=
__

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.