2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80774A new type of instability resulting in oscillatory propagating kinks is presented. It is observed in periodically forced oscillatory media at 1:1 resonance, where phase kinks have close similarities to pulses in excitable media. Considering the periodically forced complex Ginzburg-Landau equation, examples for transitions involving oscillating kinks between different dynamical regimes are described. The oscillatory instability is discussed within the framework of a bifurcation analysis of the kink profiles7 pages, Latex, submitted to Phys. Rev. E, mpeg simulations available at http://www.rudzick.de/kink.htmlPattern Formation and Solitonstext