RT info:eu-repo/semantics/article
T1 A Carrington-like geomagnetic storm observed in the 21st century
A1 Cid Tortuero, Consuelo
A1 Saiz Villanueva, María Elena
A1 Guerrero Ortega, Antonio
A1 Palacios Hernández, Judith
A1 Cerrato Montalbán, Yolanda
K1 Geomagnetics storms
K1 Space Physics
K1 Solar and Stellar Astrophysics
K1 Física
K1 Physics
K1 Astronomía
K1 Astronomy
AB 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 inHungary. The analysis of the H-field at different locations during the ''Carrington-like'' event leads to a re-interpretation ofthe 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 thelarge spike in the horizontal component (H) of terrestrial magnetic field depends strongly on magnetic local time (MLT); (b) themain 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 thanexpected.
SN 2115-7251
YR 2015
FD 2015-05-21
LK http://hdl.handle.net/10017/29324
UL http://hdl.handle.net/10017/29324
LA eng
NO Ministerio de Economía, Industria y Competitividad
DS MINDS@UW
RD 20-abr-2024