(a) Cumulative flare frequency distribution as a function of flare energy. The horizontal axis is the bolometric energy released by flares. The vertical axis represents the cumulative flare frequency, the number of flares with a flare energy larger than a given value per day. Please note that we cannot detect the flares with occurrence frequency of much less than ∼4.5 × 10−2 d−1 since the total observation time is ∼22 d. (b) Flare frequency distribution as a function of flare energy. The horizontal axis represents the flare frequency normalized by the bin width. The dotted line represents a power-law fit to the data in the flare energy ranging from 1032 erg to 1034 erg. The power-law index estimated from the fit is −1.75 ± 0.04. (Color online)
