Abstract
Pattern formation is studied numerically in a three‐variable reaction‐diffusion model with onset of the oscillatory instability at a finite wavelength. Traveling and standing waves, asymmetric standing‐traveling wave patterns, and target patterns are found. With increasing overcriticality or system length, basins of attraction of more symmetric patterns shrink, while less symmetric patterns become stable. Interaction of a defect with an impermeable boundary results in displacement of the defect. Fusion and splitting of defects are observed.