PENGUIn multi-instrument observations of dayside high-latitude injections during the 23 March 2007 substorm

Document Type

Article

Publication Date

1-1-2009

Abstract

This paper presents ground-based observations from Antarctic stations during a substorm observed, on 23 March 2007. Using fluxgate magnetometer data, supported by numerical modeling, the locations of the stations are shown to straddle the open-closed magnetic field boundary. Near these locations (on closed field lines), VLF and riometer signatures are observed to show effects of energetic particle precipitation in the morning sector (extending to the postdawn region), confirmed by observations at geosynchronous orbit. In the VLF data, both, the initial injection as well as echoes are observed. The mechanism responsible for such high-latitude injections is thought to be a combination of dynamics of the injection process and drift-shell splitting. Further work will address whether similar observations can be used to infer the dynamics and/or location of the injection region. Copyright 2009 by the American Geophysical Union.

Identifier

77954336575 (Scopus)

Publication Title

Journal of Geophysical Research Space Physics

External Full Text Location

https://doi.org/10.1029/2008JA013507

e-ISSN

21699402

Issue

1

Volume

114

Grant

0636623

Fund Ref

National Science Foundation

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