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Space weather events in July 1982 and October 2003 and the effects of geomagnetically induced currents on Swedish technical systems

Wik, Magnus LU ; Pirjola, R.; Lundstedt, Henrik LU ; Viljanen, A.; Wintoft, P. and Pulkkinen, A. (2009) In Annales Geophysicae 27(4). p.1775-1787
Abstract
In this paper, we analyse in detail two famous space weather events; a railway problem on 13-14 July 1982 and a power blackout on 30 October 2003. Both occurred in Sweden during very intensive space weather storms and each of them a few years after the sunspot maximum. This paper provides a description of the conditions on the Sun and in the solar wind leading to the two GIC events on the ground. By applying modelling techniques introduced and developed in our previous paper, we also calculate the horizontal geoelectric field at the Earth's surface in southern Sweden during the two storms as well as GIC flowing in the southern Swedish 400 kV power grid during the event in October 2003. The results from the calculations agree with all... (More)
In this paper, we analyse in detail two famous space weather events; a railway problem on 13-14 July 1982 and a power blackout on 30 October 2003. Both occurred in Sweden during very intensive space weather storms and each of them a few years after the sunspot maximum. This paper provides a description of the conditions on the Sun and in the solar wind leading to the two GIC events on the ground. By applying modelling techniques introduced and developed in our previous paper, we also calculate the horizontal geoelectric field at the Earth's surface in southern Sweden during the two storms as well as GIC flowing in the southern Swedish 400 kV power grid during the event in October 2003. The results from the calculations agree with all measured data available. In the July-1982 storm, the geomagnetic field variation, Delta B-x, reached values up to similar to 2500 nT/min and the geoelectric field reached values in the order of several volts per kilometer. In the October-2003 storm, the geomagnetic field fluctuations were smaller. However, GIC of some hundreds of amperes flowed in the power grid during the October-2003 event. Technological issues related to the railway signalling in July 1982 and to the power network equipment in October 2003 are also discussed. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Solar physics, Geomagnetic induction, paleomagnetism, Geomagnetism and, Electromagnetics, General or miscellaneous, astrophysics, and, astronomy, Flares and mass ejections
in
Annales Geophysicae
volume
27
issue
4
pages
1775 - 1787
publisher
European Geosciences Union
external identifiers
  • wos:000265603100039
  • scopus:76149101952
ISSN
1432-0576
language
English
LU publication?
yes
id
10c69b38-c58e-4381-a56d-daf34d9753be (old id 1428163)
date added to LUP
2009-06-25 10:50:53
date last changed
2017-11-12 03:24:28
@article{10c69b38-c58e-4381-a56d-daf34d9753be,
  abstract     = {In this paper, we analyse in detail two famous space weather events; a railway problem on 13-14 July 1982 and a power blackout on 30 October 2003. Both occurred in Sweden during very intensive space weather storms and each of them a few years after the sunspot maximum. This paper provides a description of the conditions on the Sun and in the solar wind leading to the two GIC events on the ground. By applying modelling techniques introduced and developed in our previous paper, we also calculate the horizontal geoelectric field at the Earth's surface in southern Sweden during the two storms as well as GIC flowing in the southern Swedish 400 kV power grid during the event in October 2003. The results from the calculations agree with all measured data available. In the July-1982 storm, the geomagnetic field variation, Delta B-x, reached values up to similar to 2500 nT/min and the geoelectric field reached values in the order of several volts per kilometer. In the October-2003 storm, the geomagnetic field fluctuations were smaller. However, GIC of some hundreds of amperes flowed in the power grid during the October-2003 event. Technological issues related to the railway signalling in July 1982 and to the power network equipment in October 2003 are also discussed.},
  author       = {Wik, Magnus and Pirjola, R. and Lundstedt, Henrik and Viljanen, A. and Wintoft, P. and Pulkkinen, A.},
  issn         = {1432-0576},
  keyword      = {Solar physics,Geomagnetic induction,paleomagnetism,Geomagnetism and,Electromagnetics,General or miscellaneous,astrophysics,and,astronomy,Flares and mass ejections},
  language     = {eng},
  number       = {4},
  pages        = {1775--1787},
  publisher    = {European Geosciences Union},
  series       = {Annales Geophysicae},
  title        = {Space weather events in July 1982 and October 2003 and the effects of geomagnetically induced currents on Swedish technical systems},
  volume       = {27},
  year         = {2009},
}