Temporal and Spatial Characteristics of Solar Flares from Observations

摘要: Temporal and spatial characteristics of solar flares are briefly reviewed in this paper. The global, temporal behaviours given first. Besides the 154-day periodicity, an 80-day periodicity occurrence rate large hard X-ray bursts for period 1980 February – 1985 December, delay peak pointed out, then gregariousness major is shown. In third section, time process structure individual shown described according to space ground-based observations. last section two problems on flare properties discussed. (i) Previous classifications based generally observations a single spectral region. A new classification multi-spectral regions given. (ii) Energy released part loop seems be not enough whole flare, qualitative model which energy supplied by untwisting magnetic fields proposed.