Increasing solar chromosphere line intensities with solar activity

Solar activity is characterized either by sunspots or by plages. Sunspots are detected in the continuum visible as dark features. Plages are defined in chromospheric lines such as CaII H and K or HI H-alpha by brightness enhancements. Chromospheric activity is an important parameter for the knowledge of the equilibrium input and output energy of the outer solar atmosphere. The OSO-8/L.P.S.P.-multichannel experiment has recorded simultaneous chromospheric profiles in H and K CaII, h and k MgII, L-alpha and L-beta HI lines. Those lines are formed from the temperature minimum (4200 K) to the higher part of the chromosphere (30000 K). A data set recorded over a quiet sun, plage, penumbra, and filament is presented hereafter. The observations, data reduction, and calibration are described. Then a comparison between line intensities is made and results are discussed