Outburst properties for normal (black) and giant flares (blue and orange) vs. inner truncation radius of quiescent geometrically thin disc. Peak accretion rate (13) (upper left); Characteristic times, calculated using (11) for the flare evolution before the peak and (5) for the characteristic flare duration (upper right); Inner disc accretion rate before the flare (bottom left); Mass involved in a flare (bottom right). The blue curves show the upper limit, obtained if the disc is heated to the radius R_out,max. The orange curves represent the lower limit following assumption R_out = R_trunc + z₀ (see Sect. 4).