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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/59749
Lightning stroke clustering into cloud-to-ground lightning flashes
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Cloud-to-ground stroke data have been analysed for the years 2010-2012 for the Cata-
lan region. These strokes have been grouped together into lightning
ashes using a hierarchical
clustering method, with two di erent approaches to the clustering radius, as the objective of the
study was to evaluate di erent clustering methods. The results for the two approaches were com-
pared with the results from a step-by-step method, giving us di erences of 2% and 7% in the nal
number of lightning
ashes. Using di erent values for the lightning
ash window and lightning spa-
tial radius the multiplicity values from the clustering methods results ranged from 1.6 to 2.0. These
results can improve the reliability of studies where the number of lightning
ashes is important such as in severe weather case studies or in climatological rainfall to lightning ratio analysis.
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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2014, Tutor: Joan Bech
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DALMASSO BLANCH, Eloi. Lightning stroke clustering into cloud-to-ground lightning flashes. [consulted: 11 of October of 2026]. Available at: https://hdl.handle.net/2445/59749