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Active region 11029 was a small, highly flare-productive solar active regionobserved at a time of extremely low solar activity. The region produced onlysmall flares: the largest of the $>70$ Geostationary ObservationalEnvironmental Satellite (GOES) events for the region has a peak 1--$8{\AA}$flux of $2.2\times 10^{-6} {\rm W} {\rm m}^{-2}$ (GOES C2.2). Thebackground-subtracted GOES peak-flux distribution suggests departure frompower-law behavior above $10^{-6} {\rm W} {\rm m}^{-2}$, and a Bayesian modelcomparison strongly favors a power-law plus rollover model for the distributionover a simple power-law model. The departure from the power law is attributedto this small active region having a finite amount of energy. The rate offlaring in the region varies with time, becoming very high for two dayscoinciding with the onset of an increase in complexity of the photosphericmagnetic field. The observed waiting-time distribution for events is consistentwith a piecewise-constant Poisson model. These results present challenges formodels of flare statistics and of energy balance in solar active regions.

Evidence for departure from a power-law flare size distribution for a small solar active region