RT info:eu-repo/semantics/article
T1 On extreme geomagnetic storms
A1 Cid Tortuero, Consuelo
A1 Palacios Hernández, Judith
A1 Saiz Villanueva, María Elena
A1 Guerrero Ortega, Antonio
A1 Cerrato Montalbán, Yolanda
K1 Geomagnetic storm
K1 Space weather: Geomagnetic indices
K1 Astronomía
K1 Fisica
K1 Physics
K1 Astronomy
AB Extreme geomagnetic storms are considered as one of the major natural hazards for technology-dependent society. Geomagnetic field disturbances can disrupt the operation of critical infrastructures relying on space-based assets, and can also result in terrestrial effects, such as the Quebec electrical disruption in 1989. Forecasting potential hazards is a matter of high priority, but consideringlarge flares as the only criterion for early-warning systems has demonstrated to release a large amount of false alarms andmisses. Moreover, the quantification of the severity of the geomagnetic disturbance at the terrestrial surface using indices as Dstcannot be considered as the best approach to give account of the damage in utilities. High temporal resolution local indices comeout as a possible solution to this issue, as disturbances recorded at the terrestrial surface differ largely both in latitude and longitude.The recovery phase of extreme storms presents also some peculiar features which make it different from other less intensestorms. This paper goes through all these issues related to extreme storms by analysing a few events, highlighting the March 1989storm, related to the Quebec blackout, and the October 2003 event, when several transformers burnt out in South Africa.
SN 2115-7251
YR 2014
FD 2014-09-13
LK http://hdl.handle.net/10017/29340
UL http://hdl.handle.net/10017/29340
LA eng
NO Solar and Stellar Astrophysics
DS MINDS@UW
RD 18-abr-2024