1. Summary Lecture.- A Survey of Interplanetary and Terrestrial Phenomena Associated with Solar Flares.- 2. Solar Particles and Electromagnetic Radiation.- High Energy Flare Radiation.- Satellite Observations of Solar Cosmic Rays.- Propagation of Solar and Galactic Cosmic Rays of Low Energies in Interplanetary Medium.- Particle Event Forecasting.- Proposed Solar Proton Event Classification System.- 3. Solar Wind Variations During and After Solar Events.- Solar Wind Disturbances Associated with Solar Activity.- Variations of Solar Wind Fluxes Observed on Board Venera-5 and Venera-6 from January 21 to March 21 1969, and Pulsations of the Earth's Electromagnetic Field Caused by these Variations.- Magnetic Field Variations in Interplanetary Space.- 4. Bow Shock Variations Following Solar Events.- Plasma Measurements Across the Bow Shock and in the Magnetosheath.- Interaction of Solar Energetic Particles with the Earth's Bow Shock and Magnetopause.- Magnetic and Electric Field Changes Across the Shock and in the Magnetosheath.- 5. The Magnetosphere During and After Solar Events.- Solar Particle Observations over the Polar Caps.- Access of Solar Particles to Synchronous Altitude.- Entry of Low Energy Solar Protons into the Magnetosphere.- Trapped Particle Population Changes Associated with Solar Events.- Geomagnetic Storms at ATS 1.- Magnetospheric Electric Fields.- 5A. The Magnetotail.- Experimental Observations in the Magnetotail during an Interplanetary Disturbance.- Tearing Instabilities in the Magnetosphere.- 6. Some Ionospheric Effects Following Solar Events.- Current Problems in Polar-Cap Absorption.- Interdisciplinary Investigations of the Auroral Phenomena.- Aspects of Auroral Morphology.- Acceleration and Precipitation of Van Allen Electrons DuringMagnetospheric Substorms.- 7. Satellite and Rocket Results for the February 25, 1969 Event.- to the ESRO Spacecraft ESRO-II/IRIS, ESRO-I/AURORAE and HEOS-1.- Ground Observations of the Solar Event of February 25, 1969.- Substorm Influences on VHF Continuous Wave Auroral Backscatter.- X-Ray Observations between 1 and 55 Å of the February 25th Flare.- The Solar Particle Event of February 25, 1969.- Interplanetary Magnetic Field Measured by Pioneer 8 during the 25 February 1969 Event.- Observation of Solar Wind Discontinuities from February 24 to February 28, 1969.- Observations of the Spectra and Time History of Protons in Interplanetary Space, February 25-28, 1969.- Solar Cosmic Ray Increase on 25 February-5 March, 1969 According to Measurements from Venus-5 and Venus-6 Space Probes.- Low Energy Proton Measurements in Interplanetary Space on Board the HEOS-1 Satellite.- The Solar Particle Events of 25 February, 1969. Directional Measurements of Solar Protons with Energies Greater than 360 MeV on HEOS-1.- Observations Recorded by the Leeds University Cosmic Ray Detector on Board the ESRO-II Spacecraft during the Solar Flare of February 25th 1969.- ESRO-I Satellite Observations of 1-30 MeV Protons During the 25th February 1969 Solar Event.- Rocket Measurements of Protons and ?-Particles During the February 25, 1969 Solar Event.- Rocket Observations of Protons and ?-Particles at Andøya after the Solar Flares of 24th-25th February, 1969.- Electron Density Observations During the PCA Event of 25 February, 1969.- Rocket-Borne D-Region Probe Measurements.- Electron Density Measurements in the Thermal Plasma of the Magnetosphere Using a Langmuir Probe.- Ionospheric Measurements by the ESRO-I Satellite During the February 25th 1969 Solar Proton Event.- ESRO-I SatelliteObservations of 45-450 keV Electrons During the Period 24th February-3rd March, 1969.- ESRO-I Measurements of Low-Energy Auroral Particles from February 23 to March 2, 1969.- An Observation of the February 26, 1969 Interplanetary Shock Wave.- The Association of Energetic Storm Particles with Interplanetary Shock Waves.- GM Observations of Auroral Particles and Ground Observations During the February 25th Solar Event.- Observation of Low-Energy Solar Protons During the February 25, 1969 Event.- High Energy Solar Electrons.- OGO-5 Measurements of Electrons Above 500 MeV.- 8. Lecture in Conclusion.- Suggestions for Future Observations.- Index of Names.
