Content -- Preface -- Network partners -- Associated partners -- Coordination and administration -- Summary -- In the light of the aurora - Optical auroral research in northernmost Europe -- 1. Optical aurora -- 1.1 The most variable light in the sky. -- 1.2 Reading the messages of the aurora -- 1.3 Measuring the optical aurora -- Literature and home pages about aurora -- 2. Research groups -- 2.1 Norway -- 2.2 Sweden -- 2.3 Finland -- 2.4 Russia -- 3. Facilities and instruments for measurements of optical aurora -- 3.1 Facilities in Svalbard -- 3.2 Mainland facilities and instrument networks -- 3.3 Mobile instruments -- 4. Network for Groundbased Optical Auroral Research in the Arctic Region -- 4.1 Goals of the network (http://www.irf.se/nordopt) -- 4.2 Workshops -- 4.3 Mobility program -- 5. Research projects conducted within the network, descriptions and first results -- 5.1. High resolution study of auroral folds, curls and structuring taking place on several spatial scales -- 5.2 Combined multi-station multi-monochromatic optical and incoherent scatter observations of small-scale aurora -- 5.3 Enhanced electric field inside an auroral arc inferred from coordinated EISCAT and ALIS observations -- 5.4. Features of pulsating arcs inferred from ALIS triangulation measurements -- 5.5 Optical, radar, and magnetic observations of the magnetosheath plasma capturing during a positive impulse in IMF Bz-component. -- 5.6 Scaling behaviour of auroral luminosity -- 5.7 Intermolecular energy transfers in electronic energy quenching for molecular collisions N2-N2, N2-O2, O2-O2. -- 5.8 Modelling electron density and NOx changes -- 5.9 Application of AIDA (ALIS data analysis package) to data from other imagers -- 5.10 History of auroral research -- 6. Conclusions -- Publications within the network -- Yhteenveto.

Revontulten valossa - Optinen revontulitutkimus Pohjois-Euroopassa -- Заключение -- В свете полярных сияний - Исследование полярных сияний оптическими методами на севере Европы -- Sammanfattning -- Upplyst av norrsken - Forskning om optiskt norrsken i nordligaste Europa -- Appendix -- List of acronyms.