Auroral Undulations in the Afternoon/Dusk Sector Observed with the IMAGE FUV/Wideband Imaging Camera and Their Magnetic Connection to Plasmaspheric Plumes

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

2407 Auroral Ionosphere (2704), 2704 Auroral Phenomena (2407), 2736 Magnetosphere/Ionosphere Interactions

Scientific paper

On February 6, 2002 the IMAGE FUV/Wideband Imaging Camera (WIC) detected a periodic series of tongue-like emission features that extended equatorward from the main auroral oval in the afternoon/dusk sector. Although clearly discernible in the electron aurora, these features cannot be distinguished from background in simultaneous images of the proton aurora. The emission tongues were observed during the recovery phase of a moderate magnetic storm and occurred during a substorm expansion phase. Their wavelength, amplitude, and westward velocity are consistent with those reported for giant undulations observed at the equatorward edge of the diffuse aurora. However, the features seen on February 6 are embedded within a broader band of diffuse auroral emissions and in two instances are observed to brighten in conjunction with brief, localized intensifications along the portion of the oval to which they are connected. The emission tongues map to a well-developed plasmaspheric drainage plume, seen in geosynchronous plasma data as well as in near-simultaneous data from the IMAGE Extreme Ultraviolet (EUV) imager. We discuss this event in the context of previous work on undulations at the equatorward edge of the aurora and consider its implications for the various mechanisms that have been proposed to account for such structures.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Auroral Undulations in the Afternoon/Dusk Sector Observed with the IMAGE FUV/Wideband Imaging Camera and Their Magnetic Connection to Plasmaspheric Plumes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Auroral Undulations in the Afternoon/Dusk Sector Observed with the IMAGE FUV/Wideband Imaging Camera and Their Magnetic Connection to Plasmaspheric Plumes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auroral Undulations in the Afternoon/Dusk Sector Observed with the IMAGE FUV/Wideband Imaging Camera and Their Magnetic Connection to Plasmaspheric Plumes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1466614

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.