2026-04-17T23:19:20Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4466642026-01-15T03:32:13Zcom_2072_1033col_2072_452950

Lightning flashes at electric power system towers identified as Recurrent Lightning Spots observed by ground and space-based systems Ardila Murillo, Brandon Steven Montañá Puig, Juan López Trujillo, Jesús Alberto Solà de las Fuentes, Glòria Roncancio Guzmán, José Andrés Universitat Politècnica de Catalunya. Doctorat en Enginyeria Elèctrica Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica Universitat Politècnica de Catalunya. LRG - Lightning Research Group Àrees temàtiques de la UPC::Enginyeria elèctrica RLS GLM LMA Tall towers Lightning interaction This study integrates space-based optical detections with ground-based measurements of lightning flashes on electric power system towers forming Recurrent Lightning Spots (RLS). We found that the lightning-tall tower interaction was related to downward leaders from the thunderstorm charge regions, with no upward flashes recorded. Likewise, cloud-to-ground (CG) strokes in RLSs associated with fast downward leaders exhibit the highest magnitude currents. Our findings suggest that thunderstorms' lower positive charge regions may contribute to increased lightning activity at RLS and revealed a correlation between lightning strokes in RLS with high peak currents and elevated values of integrated optical energy. We identified that the leader's propagation altitude and type and the VHF power emitted by lightning leaders are influential factors in detecting CG strokes from space Peer Reviewed Postprint (published version) 2026-02 Article Ardila, B. [et al.]. Lightning flashes at electric power system towers identified as Recurrent Lightning Spots observed by ground and space-based systems. «Electric power systems research», Febrer 2026, vol. 251, núm. article 112334. 1873-2046 https://hdl.handle.net/2117/446664 10.1016/j.epsr.2025.112334 eng https://www.sciencedirect.com/science/article/pii/S0378779625009216 http://creativecommons.org/licenses/by-nc-nd/4.0/ Open Access Attribution-NonCommercial-NoDerivatives 4.0 International application/pdf Elsevier