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PENGUIn multi-instrument observations of dayside high-latitude injections during the 23 March 2007 substorm
Space Science Center, University of New Hampshire, Durham, New Hampshire, USA
Department of Physics, Siena College, Loudonville, New York, USA
Space Telecommunications and Radioscience Laboratory, Stanford University, Palo Alto, California, USA
Space Telecommunications and Radioscience Laboratory, Stanford University, Palo Alto, California, USA
New Jersey Institute of Technology, Newark, New Jersey, USA
New Jersey Institute of Technology, Newark, New Jersey, USA
Center for Space Environment Modeling, University of Michigan, Ann Arbor, Michigan, USA
Department of Physics, Augsburg College, Minneapolis, Minnesota, USA
Department of Computer Science, Augsburg College, Minneapolis, Minnesota, USA
Virginia Institute of Technology, Blacksburg, Virginia, USA
Department of Physics, Dartmouth College, Hanover, New Hampshire, USA
Space Sciences Laboratory, University of California, Berkeley, California, USA
Space Sciences Laboratory, University of California, Berkeley, California, USA
Institute of the Physics of the Earth, Moscow, Russia
Institute for Physical Science and Technology, University of Maryland, College Park, Maryland, USA
Institute for Physical Science and Technology, University of Maryland, College Park, Maryland, USA
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.
Received 17 June 2008; accepted 13 November 2008; published 29 January 2009.
Citation: (2009), PENGUIn multi-instrument observations of dayside high-latitude injections during the 23 March 2007 substorm, J. Geophys. Res., 114, A00C11, doi:10.1029/2008JA013507.
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