7704 20260105155931.0 POSTER-2026-0012 French, Ryan Solar Orbiter observations of small-scale ribbon structures during a solar flare 2025 2025-06-08 We present fast cadence and high resolution observations of flare ribbons from the Solar Orbiter Extreme Ultraviolet Imager (EUI). Utilizing the short-exposure observations from the EUI High Resolution Imager in the EUV (HRIEUV), we find small-scale bead-like kernel structures propagating along the end of the flare ribbon during the impulsive phase of an M-class solar flare. These bead structures are dynamic, with well-resolved spatial separations of ≈800 kilometers – well below the observable limit of full-disk solar imagers. We analyze the evolution of the plane-of-sky velocity, size and separation of the flare ribbon structures, as well as the power distribution of the features along the ribbon. Finally, we compare these observables with different models of magnetic reconnection instabilities, to probe the processes triggering flare onset. STCE Solar Orbiter EUI flare Kazachenko, Maria Berghmans, David D'Huys, Elke Dominique, Marie Talpeanu, Dana 246th Meeting of the American Astronomical Society, Anchorage/Alaska david.berghmans@ksb-orb.be https://aas.org/meetings/aas246/program https://ui.adsabs.harvard.edu/abs/2025AAS...24622403F/abstract CPOSTER