Particle Acceleration at Flares

During solar flares a large amount of energy is suddenly released. Flares are accompanied with a strong enhancement of emissions of electromagnetic radiation from the radio up to the γ‐ray range and of fluxes of energetic particles indicating the Sun as a giant particle accelerator. The energetic electrons play an important role, since they carry a substantial part of the energy released during flares and are responsible for the nonthermal solar radio and X‐ray radiation. The phenomena of energetic particles and nonthermal radio and X‐ray emissions are demonstrated at the example of the solar event on October 28, 2003. The electron acceleration is dicussed at the shock established in the outflow region of the reconnection site.