MULTIWAVELENGTH OBSERVATIONS OF THE 5 JANUARY 1992 FLARE

The 5 January 1992 flare around 13:16 UT was observed in H alpha, H ep silon, and Ca II H with the imaging spectrographs at Locamo-Monti, Swi tzerland and in soft and hard X-rays by the Yohkoh satellite. In this paper we discuss the analysis of the temporal and spatial evolution of this flare well observed at chromospheric and coronal layers. We find that the strongest footpoint emission in the optical lines does not c oincide with the sites of non-thermal electron injection and show that these footpoints are mainly heated by thermal conduction. The chromos pheric electron density, determined from the H epsilon line profiles, shows several temporally well correlated rises with the hard X-ray int ensity at the electron injection sites. Two of the flare loops clearly are associated with strong chromospheric evaporation, while very weak evaporation is observed in the loop with the strongest footpoint emis sion in the optical lines.