000008090 001__ 8090
000008090 005__ 20260319145401.0
000008090 037__ $$aCTALK-2026-0104
000008090 100__ $$aCollier, Hannah 
000008090 245__ $$aThe temporal and spatial scales of EUV flare kernels: New insights from EUI/HRI
000008090 260__ $$c2026
000008090 269__ $$c2026-03-18
000008090 520__ $$aBy studying the dynamics of flare ribbons, one obtains an indirect measurement of reconnection in the corona. The aim of this work is to quantify the spatial and temporal scales of EUV flare ribbon kernels as a probe of the spatial extent and duration of energy injection in solar flares. To do this, unprecedented data from the March 2024 major flare campaign of Solar Orbiter were used. These data were obtained at high-cadence in short-exposure mode with the Extreme Ultraviolet Imager's HRI telescope. Individual kernels were automatically identified and from this, the size distributions of kernels for different intensity thresholds were derived. In addition, an average light curve of individual kernels was extracted. Our analysis shows that a significant fraction of kernels were unresolved at a plate scale of 135 km/pix. Furthermore, we derived incredibly short injection times of less than a few seconds. These results emphasise the small spatial and short temporal scales involved in flare energy release. These findings necessitate an in-depth investigation into the implications of such small areas and short injections on the energy flux deposited in solar flares, and the response of the atmosphere.
000008090 594__ $$aSTCE
000008090 700__ $$aKrucker, Säm 
000008090 700__ $$aHayes, Laura 
000008090 700__ $$aKraaikamp, Emil 
000008090 700__ $$aBerghmans, David 
000008090 700__ $$aRyan, Daniel 
000008090 773__ $$t10th Solar Orbiter Workshop
000008090 8560_ $$fdavid.berghmans@ksb-orb.be
000008090 85642 $$ahttps://plan.events.mpg.de/event/453/contributions/2441/
000008090 906__ $$aContributed
000008090 980__ $$aCTALKCONT