The 9th SOHO Workshop

  Helioseismic Diagnostics of Solar Convection and Activity

                 Stanford, California, USA

                    July 12 - 15, 1999


         PRELIMINARY ANNOUNCEMENT


The Ninth SOHO Workshop will take place on July, 12-15, 1999, at
Stanford, California, USA, hosted by the Solar Oscillation
Investigation group at Stanford University.

The Workshop will focus on methods and results of helioseismic
diagnostics of the internal structure and dynamics of solar
convection and active regions. The methods of local helioseismology
(time-distance tomography, ring-diagram analysis, acoustic imaging
and holography), intensively developed in the past few years, have
provided promising results on the deep structure of large-scale
convection and flows, emerging active regions and sunspots, which are
important for understanding the dynamics of the convection zone and
the origin of solar activity. Our understanding will progress rapidly
only by bringing theoretical ideas and numerical models face to face
with the new observations of the Sun's interior.

 An important goal of the Workshop is to promote collaborations among
experimenters, analysts, and theorists. We will discuss the status
and latest results of local helioseismology and implications of these
results for theories of solar convection and activity, and will be
challenged to think about new directions. The Workshop will consist
of invited and contributed talks, posters, and working group sessions
focused on specific topics of analysis and modeling.

SCHEDULE

This is the preliminary announcement of the meeting. If you wish to
receive further announcements, please fill in the pre-registration
form in the SOHO-9 Workshop WWW page http://quake.stanford.edu/~SOHO-9
by January, 15, 1999.

The first announcement will be sent in February 1999. It will contain
a preliminary scientific program, more detailed information about the
workshop, information about publication of the proceedings, etc.

SCIENTIFIC ORGANIZING COMMITTEE (SOC)

D.-Y. Chou (National Tsing Hua University, Taiwan)
T. L. Duvall, Jr (Goddard Space Flight Center, USA)
D. O. Gough (University of Cambridge, UK)
J. W. Harvey (National Solar Observatory, USA)
B. Fleck (European Space Agency)
A. G. Kosovichev (Stanford University, USA, Chair)
J. Patron (Instituto de Astrofisica de Canarias, Spain)
J. Provost (Observatoire de la Cote d'Azur, France)
P. H. Scherrer (Stanford University, USA)
H. Shibahashi (University of Tokyo, Japan)
S.K. Solanki (ETH, Zurich, Switzerland)
J. Staude (Astrophysikalisches Institut Potsdam, Germany)
J. Toomre (University of Colorado, USA)

LOCAL ORGANIZING COMMITTEE (LOC)
Rock Bush - Tom Duvall - Alexander Kosovichev - Philip Scherrer -
Margie Stehle

The SOHO-9 Workshop URL: http://quake.stanford.edu/~SOHO-9
e-mail address: SOHO-9@quake.stanford.edu