Session 7 - GICs: Ground system hazards from geomagnetically induced currents – research, developments, services, and operations.

Mark Clilverd (British Antarctic Survey, UK), Craig Rodger (Univ. of Otago, NZ)
Tuesday 19/11, 09:00-10:30

Geomagnetically induced currents (GIC) in ground systems are one of the better recognised hazards that can result from large geomagnetic storms, appearing in many national risk registers. Coupling via processes in the ionosphere, an example of GIC is the hazard to electrical transmission networks as a consequence of damage to power network transformers at high, mid and even comparatively low geomagnetic latitudes. Another example of the hazard is through induced currents in long-distance pipeline structures, with changes in protective offset voltage biases and increased potential for corrosion. However, understanding the origin of the hazard, and providing alerts to operators is challenging, due to the complexity of the physical linkages involved. The measurement, modelling, prediction and mitigation of the effects of Space Weather on the ground, such as unwanted geomagnetically induced currents in power systems, pipelines, and railway networks are required by the industries affected.

In this session we particularly encourage submissions which identify end user requirements and experience, together with new developments in space weather operations or services including underpinning research, best practice in transitioning research to operations, and verification activities. We also would like to hear from those involved in developing early warning of ground-level geomagnetic disturbances from solar wind measurements, members of industry, and from those involved in the modelling of the magnetosphere during geomagnetic storms with a regard to understanding the processes involved in the generation of ground-level and near-Earth disturbances. We also welcome general contributions that advance GIC research and applications of research.

Tuesday November 19, 09:00 - 10:30, Elisabeth

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Talks : Time schedule

Tuesday November 19, 09:00 - 10:30, Elisabeth
09:00Geomagnetically Induced Currents (GICs): The Role of Space Weather ServicesSinger, H et al.Invited Oral
09:30Modelling GICs in Sweden – verification and extreme event analysisRosenqvist, L et al.Invited Oral
10:00Transpower measurements of GIC in New ZealandRodger, C et al.Invited Oral