7703 20260105155525.0 10.3847/2041-8213/ae2684 DOI SCART-2026-0011 French, Ryan J. Evolution of Flare Ribbon Bead-like Structures in a Solar Flare 2025 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 extreme-ultraviolet, we find small-scale blob/bead-like kernel structures propagating within a hook at the end of a flare ribbon, during the impulsive phase of a C9.9-class solar flare. These bead structures are dynamic, with well-resolved spatial separations as low as ≈420–840 km (3–6 pixels) below the observable limit of full-disk solar imagers. We analyze the evolution of the plane-of-sky apparent velocity and separation of the flare ribbon structures, finding evidence for multiple processes occurring simultaneously within the flare ribbon. These processes include quasiperiodic pulsation–like brightenings, slow back-and-forth zigzag motions along the ribbon, rapid apparent motions along the ribbon (600+ km s−1), and stationary blob-like structures. Finally, we conduct fast Fourier transform analysis and analyze the start times of exponential growth in the power spectrum at different spatial scales across the flare ribbon. Our analysis reveals that the ribbon beads form with a key spatial separation of 1.7–1.9 Mm before developing into more complex structures at progressively larger and smaller spatial scales. This observation is consistent with predictions of the tearing mode instability. STCE Solar Orbiter EUI flare Kazachenko, Maria D. Berghmans, David D'Huys, Elke Dominique, Marie Patel, Ritesh Talpeanu, Dana-Camelia Tamburri, Cole A. Yadav, Rahul The Astrophysical Journal Letters 995 2025 2, id.L54 david.berghmans@ksb-orb.be https://arxiv.org/abs/2512.00710 https://iopscience.iop.org/article/10.3847/2041-8213/ae2684 published in REFERD