A Carrington-like geomagnetic storm observed in the 21st century
Autores
Cid Tortuero, Consuelo; Saiz Villanueva, María Elena; Guerrero Ortega, Antonio; Palacios Hernández, Judith; Cerrato Montalbán, YolandaIdentificadores
Enlace permanente (URI): http://hdl.handle.net/10017/29324DOI: 10.1051/swsc/2015017
ISSN: 2115-7251
Fecha de publicación
2015-05-21Patrocinadores
Ministerio de Economía, Industria y Competitividad
Junta de Comunidades de Castilla-La Mancha
Cita bibliográfica
Journal of Space Weather and Space Climate, 2015, v. A16, n. 5, p. 1-6
Palabras clave
Geomagnetics storms
Space Physics
Solar and Stellar Astrophysics
Proyectos
info:eu-repo/grantAgreement/MINECO//AYA2013-47735-P/ES/NUEVOS RETOS EN LA CIENCIA DE LA INTERACCION SOL-TIERRA ANTE LAS NECESIDADES TECNOLOGICAS DE LA SOCIEDAD ACTUAL
info:eu-repo/grantAgreement/JCCM//PPII10-0183-7802/ES
Tipo de documento
info:eu-repo/semantics/article
Versión
info:eu-repo/semantics/publishedVersion
Versión del editor
http:/7dx.doi.org/10.1051/swsc/2015017Derechos
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
© EDP Sciences, 2015
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
In September 1859 the Colaba observatory measured the most extreme geomagnetic disturbance ever recorded at low latitudes related to solar activity: the Carrington storm. This paper describes a geomagnetic disturbance case with a profile extraordinarily similar to the disturbance of the Carrington event at Colaba: the event on 29 October 2003 at Tihany magnetic observatory in
Hungary. The analysis of the H-field at different locations during the ''Carrington-like'' event leads to a re-interpretation of
the 1859 event. The major conclusions of the paper are the following: (a) the global Dst or SYM-H, as indices based on averaging,
missed the largest geomagnetic disturbance in the 29 October 2003 event and might have missed the 1859 disturbance, since the
large spike in the horizontal component (H) of terrestrial magnetic field depends strongly on magnetic local time (MLT); (b) the
main cause of the large drop in H recorded at Colaba during the Carrington storm was not the ring current but field-aligned currents
(FACs); and (c) the very local signatures of the H-spike imply that a Carrington-like event can occur more often than
expected.
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