Solar-Geophysical Data Number 506, October 1986. Part 1 (prompt reports). Data for September 1986, August 1986, and late data

Contents include: Detailed index for 1986; Data for September 1986--(IUWDS alert periods (advance and worldwide), Solar activity indices, Solar flares, Solar radio emission, Stanford mean solar magnetic field); Data for August 1986--(Solar active regions, Sudden ionospheric disturbances, Solar radio spectral observations, Cosmic-ray measurements by neutron monitor, Geomagnetic indices, Radio propagation indices); Late data--(Solar radio emission August 1986, Solar active regions July 1986, Cosmic-ray measurements by neutron monitor, Calcium plage data December 1985-February 1986)