Probing Magnetic Fields in the Solar Interior

Dean-Yi Chou
Physics Department, Tsing Hua University, Hsinchu, 30043, Taiwan

Helioseismology uses solar p-mode oscillations to probe the structure
of the solar interior.  The modifications of p-mode properties due to 
the presence of solar magnetic fields provide information on 
the distribution of magnetic fields in the solar interior.
First I review current understanding of the magnetic fields in the solar
convection zone with the techniques of helioseismology.  Then I will
discuss our recent results on the magnetic fields at the base of the
convection zone.  I will also briefly describe the Taiwan Oscillation
Network (TON) project.