1997•5th International Congress of the Brazilian Geophysical SocietyRequires access
Storm-Time Low-Latitude Ionospheric Electric Fields
B. G. Fejer
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Abstract
Ionospheric plasma drifts often show highly complex and variable signatures during geomagnetically active periods due to the effects of different disturbance process. Low latitude disturbance electrodynamic drifts with times scales of about an hour are due to the prompt penetration of high latitude electric fields to lower latitudes, whereas longer lasting (up to about 30 hours) perturbation drifts results from disturbance dynamo electric fields driven by enhanced energy deposition into the high latitude ionosphere