Atmospheric Magnetic Filelds above Active Solar Region of April 13, 1950.

We have analyzed a period of well-observed prominence activity over a clear-cut active at central meiidian passage (CMP) on April 13,1950, at N. 13 heliographic latitude. Good-quality Climax west-limb prominence films in Ha revealed that the region had an associated homogeneous field of motions that extended from the region to more than 7 X l0 km We found that the trajectories could be well described by assuming that they lay along the lines of force of a magnetic dipole buried 0 03 solar radii below the solar surface, with its axis tilted +50 from the plane of projection The projection of the axis was approximately radial There is evidence that a solar radio-noise storm at meter wave length was associated with the region and was emitted parallel to the dipole axis rather than in a radial direction from the active region There was also a geomagnetic disturbance so timed that it may well have resulted from solar corpuscles also emitted parallel to the dipole axis, at the same large angle from the solar radius.