Fifteenth European Space Weather Week
November 5 - 9, 2018, Leuven, Belgium

Session 2 - Geomagnetic Storms - Ground and near-Earth Space Weather Impacts

Craig Rodger (University of Otago), Mark Clilverd (British Antarctic Survey)
Monday 5/11, 13:30-15:00 & 15:45-17:15

Large geomagnetic storms pose a significant Space Weather impact through ground and near-Earth impacts. Coupling via processes in the ionosphere, space weather drives changes throughout the ionosphere and also in structures on the Earth’s surface. One example is the hazard to electrical transmission networks as a consequence of geomagnetically induced currents (GIC). The GIC-hazard is one of the better recognised examples of Space Weather, appearing in many national risk registers. Instances of damage to power network transformers have been reported at high, mid and even comparatively low geomagnetic latitudes - recent studies have even suggested there may be a risk around the geomagnetic equator due to intensification from the equatorial electrojet. However, understanding the origin of the hazard, and providing alerts to power grid operators is challenging, due to the complexity of the physical linkages involved. Understanding the coupling between the solar wind and near-Earth/ground impacts may well require large scale dynamic models of the magnetosphere, for example using MHD approaches. 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 near-Earth space the same current systems lead to atmospheric expansion and increased drag on LEO spacecraft.

In this session we particularly encourage submissions 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.