Induced Fields from Sudden Impulse Events

Details Induced Fields from Sudden Impulse Events Induced Fields from Sudden Impulse Events

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa41a1399s&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA41A-1399

Mathematics

Logic

7904 Geomagnetically Induced Currents, 7924 Forecasting (2722), 7954 Magnetic Storms (2788), 7959 Models

Scientific paper

The impact of solar wind pressure discontinuities during predominantly northward IMF leads to a class of disturbances known as sudden impulses (SIs). Because the current system associated with SI events is relatively isolated, they are ideally suited for investigating the large-scale current systems that couple the magnetosphere-ionosphere system. The ground signature of these events includes induced magnetic and electric fields that are sufficiently large to drive geomagnetically induced currents (GICs) in technological systems located on the surface of the Earth. We investigate the induced fields from a model of the large-scale SI-induced current system for a variety of conditions and locations. Empirical relationships derived from a collection of these events can be used to predict the expected GIC level for a given SI event.

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