PSN Friends--  For your information here are two items of general =
seismic interest---  The first was referenced to in the Nov. '10 "Review =
of Scientific Instruments".  The article describes a Foucault Pendulum =
in Argentina in which precession is read out electronically with good - =
"super" resolution.  The gentlemen noticed several deviations and =
associated them timewise to earthquakes.  This pendulem is 15 ft. tall, =
and you can imagine some wavefronts would establish a tilt and =
destabilize the normal precession.  Foucault Pendulums are interesting =
to build and observe, but reading out the precession to this degree is =
usually not pursued.
   The other note is a new book-"Predicting the Unpredictable, the =
Tumultuous Science of Earthquake Prediction" by Susan Hough.  Ms. Hough =
is a professional seismologist at the U.S. Geological Survey.  A review =
of this book is in "Physics Today" Nov. '10 issue.  She surveys the =
field from what she calls, "the sometimes murky underworld of eccentric =
amateur earthquake predictors" to professional efforts.  Included are =
references to political, legal and social aspects of prediction.   I =
gather, even with the unparalleled instrumentation of professionals, all =
we can say is earthquakes will occur wherever earthquakes have occurred. =
=20
  I am sure this would be interesting reading for anyone with interests =
in how the Earth's crust is put together, and reveals itself in volcanos =
and earthquakes.







PSN Friends--  For your =
information here are=20
two items of general seismic interest---  The first was referenced =
to in=20
the Nov. '10 "Review of Scientific Instruments".  The =
article=20
describes a Foucault Pendulum in Argentina in which precession is read =
out=20
electronically with good - "super" resolution.  The =
gentlemen=20
noticed several deviations and associated them timewise to =
earthquakes. =20
This pendulem is 15 ft. tall, and you can imagine some wavefronts would=20
establish a tilt and destabilize the normal precession.  Foucault =
Pendulums=20
are interesting to build and observe, but reading out the precession to =
this=20
degree is usually not pursued.
   The other note is a new=20
book-"Predicting the Unpredictable, the Tumultuous Science of Earthquake =

Prediction" by Susan Hough.  Ms. Hough is a professional =
seismologist at=20
the U.S. Geological Survey.  A review of this book is in "Physics =
Today"=20
Nov. '10 issue.  She surveys the field from what she calls, "the =
sometimes=20
murky underworld of eccentric amateur earthquake predictors" to =
professional=20
efforts.  Included are references to political, legal and =
social=20
aspects of prediction.   I gather, even with the =
unparalleled=20
instrumentation of professionals, all we can say is earthquakes will =
occur=20
wherever earthquakes have occurred.  
  I am sure this would be =
interesting reading=20
for anyone with interests in how the Earth's crust is put together, =
and=20
reveals itself in volcanos and earthquakes.
  Seasons Greetings to all---Jim=20
Lehman