THE MOTION PATTERNS OF INTRANETWORK MAGNETIC ELEMENTS

By tracing individual elements, we have measured horizontal velocity a nd studied motion patterns of Intranetwork (IN) magnetic elements for the first time. The magnetograms obtained at Big Bear Solar Observator y span an interval of 10-hour and cover an area of 310 x 240 are sec(2 ). In general, IN elements move radially and isotropically outwards fr om emergence centers to boundaries of supergranule cells at first. How ever, when they reach halfway between cell centers and boundaries, the motion of IN elements is non-isotropic, there are prior directions. M ost of IN elements move towards the edges of network elements. There a re two components of the velocity fields: radial velocity and circular velocity. From the centers to the boundaries of supergranule cells, t he magnitude of the radial velocity decreases gradually; but that of t he circular velocity increases obviously, at halfway between cell cent er and boundary, the circular acceleration reachs the maximum, about 1 0(-1) m s(-2) The mean circular velocity near the boundary is about 0. 4 km s(-1). The horizontal speeds deduced by tracing 768 intranetwork elements range from 0.05 km s(-1) to 0.8 km s(-1) with a peak distribu tion at 0.3 km s(-1). Both within the supergranule cells and on the bo undaries, there are convergence centers, but divergence centers always exist within supergranule cells.