All Physics Faculty Publications

Title

Evolution of equatorial ionosphericbubbles during a large auroral electrojet increase in the recovery phase of a magnetic storm

Document Type

Article

Journal/Book Title/Conference

Journal of Geophysical Research

Volume

111

Issue

A02303

Publisher

American Geophysical Union

Publication Date

2006

Abstract

We present a model and observations of the evolution of equatorial ionospheric bubbles during a large auroral electrojet (AE) index increase in the recovery phase of a geomagnetic storm. Using a three-dimensional time-dependent numerical simulation model, we find, for the 19–21 October 1998 storm, that the equatorial bubble evolution is different during storm time as compared to quiet time conditions. We have found that the storm time vertical drift in conjunction with reduced off-equatorial E region shorting is the primary mechanism that distinguishes the large AE increase recovery phase storm time evolution from the quiet time case. Comparison of the simulation model with ground-based storm time radar observations is made.

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