Please use this identifier to cite or link to this item: http://hdl.handle.net/10662/19472
Title: A limit for the values of the Dst geomagnetic index
Authors: Acero Díaz, Francisco Javier
Vaquero Martínez, José M.
Gallego Herrezuelo, María Cruz
García García, José Agustín
Keywords: Extreme Value Theory;Dst geomagnetic index;Return level;Niveles de retorno;Teoría de valores extremos;Tormentas geomagnéticas
Issue Date: 2018
Publisher: American Geophysical Union
Wiley
Abstract: The study of the extreme weather space events is important for a technological-dependent society. Extreme value theory could be decisive to characterize those extreme events in order to have the knowledge to make decisions in technological, economic, and social matters, in all fields with possible impacts. In this work, the hourly values of the Dst geomagnetic index have been studied for the period 1957–2014 using the peaks-over-threshold technique. The shape parameter obtained from the fit of the generalized Pareto distribution to the extreme values of the |Dst| index leads to a negative value implying an upper bound for this time series. This result is relevant because the estimation of this limit for the extreme values leads to 850 nT as the highest expected value for this geomagnetic index. Thus, from the previous characterization of the Carrington geomagnetic storm and our results, it could be considered the worst-case scenario.
URI: http://hdl.handle.net/10662/19472
ISSN: 0094-8276
DOI: 10.1029/2018GL079676
Appears in Collections:DFSCA - Artículos

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