Analysis of Solar Flare in Relation to the Magnetic Fields on Jan 14 1989

The data of magnetic fields measured at FeⅠ λ5324Å and Hβ84864Å were obtained during the 2B two-ribbon flare process on Jan 14,1989. The one of intial bright points of the flare was located in the inversion line of the concellation region, and the others were located near the H₁₁=0 line where the shear of longitudinal magnetic fields was very strong. We found that the gradient of longitudinal magnetic fields near the H₁₁=0 obviously decreased and the shear region had relaxed after the solar flare. The umbral flare was closely related to the changes of chromospheric magnetic field.