The Conjugate Sprite Campaign: A potential north-south collaborative project for the International Heliophysical Year

Red sprites are a luminous phenomenon which occur at high altitude above thunderstorms. It is thought that a beam of relativistic electrons may be generated during the formation of a red sprite and that this beam should travel along a magnetic eld line to the conjugate hemisphere. A campaign was organised to
detect evidence of this energetic electron beam. During the campaign more than 100 sprites were observed over Europe but no indication of the electron beam was detected near the conjugate point in the southern hemisphere. However, several interesting auxiliary observations were made with various instruments in Europe.