Relatively Low-Latitude Wave Aurora and Substorm Cycle Association

Details Relatively Low-Latitude Wave Aurora and Substorm Cycle Association Relatively Low-Latitude Wave Aurora and Substorm Cycle Association

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm41b1730l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM41B-1730

Physics

[2704] Magnetospheric Physics / Auroral Phenomena, [2790] Magnetospheric Physics / Substorms

Scientific paper

Wave aurora produces broadband particle acceleration. For many years, this type of signature was annecedotely but widely thought to occur primarily at the poleward edge of the auroral oval. Recent statistical work has found that, on the contrary, for strong solar wind driving, broadband aurora is common throughout the auroral oval. Of particular interest is the occurrence of wave aurora below 68 degrees MLAT. We have studied the dependence of such signatures, both as a function of solar wind driving, and as a function of substorm cycle. A set of about 1700 substorm onsets identified by Polar UVI, along with 116 isolated substorm onsets were used for superposed epoch analysis. The results show that the wave aurora has a very strong substorm cycle dependence, rising dramatically in the first few minutes after onset, and peaking about 10-15 minutes later. By contrast, wave aurora has no easily identifiable solar wind driving peak, although the general trend is for wave aurora to become more common with higher driving (as do substorms themselves). This evidence adds to previous circumstantial evidence associating wave aurora particularly with substorms (for example, wave auroral power is much more strongly peaked in the premidnight region than is monoenergetic or “inverted-V” aurora).

Affiliated with

Also associated with

No associations

Rating

Relatively Low-Latitude Wave Aurora and Substorm Cycle Association 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 Relatively Low-Latitude Wave Aurora and Substorm Cycle Association, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relatively Low-Latitude Wave Aurora and Substorm Cycle Association will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1880149