Fine-scan velocity and magnetic-field measurements in solar active regions

Fine scan (5 × 5 aperture) simultaneous Doppler and magnetograms have been obtained over solar active regions near the central meridian passage. Besides the mainly horizontal Evershed motion in sunspots, there appears a conspicuous descending motion over all active regions. A comparison of H-filtergrams with the fine scan magnetograms shows that dark filaments generally lie along the neutral longitudinal magnetic zone, while the H-fibrils lie along the field lines, joining regions of opposite polarity.