Substorms, poleward boundary activations, auroral streamers, omega bands, and geosynchronous particle injections during a sawtooth event

Details Substorms, poleward boundary activations, auroral streamers, omega bands, and geosynchronous particle injections during a sawtooth event Substorms, poleward boundary activations, auroral streamers, omega bands, and geosynchronous particle injections during a sawtooth event

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm41a1828h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM41A-1828

Physics

[2704] Magnetospheric Physics / Auroral Phenomena, [2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2788] Magnetospheric Physics / Magnetic Storms And Substorms

Scientific paper

A variety of auroral features are routinely observed during disturbed conditions including poleward boundary intensifications (PBIs), north-south aligned auroral structures (or ``streamers''), auroral torches, omega bands, and embedded auroral onsets. We show that PBIs and auroral streamers can evolve into auroral torches and omega bands. We show that quasi-periodic generation of streamers near a given MLT region can produce a quasi-periodic train of auroral torches that successively drift eastward to create an omega band structure. We also show that subsequent streamers can also create new torches `on-top' of an existing omega band form. These observations explain a number of previously un-explained features of omega bands. We also show that, while auroral streamer activity does not typically lead to substorm onsets, streamers can occur prior to auroral onsets -- although in such cases they are usually not co-located with the onset region. Interpreting the auroral streamers as ionospheric manifestations of bursty bulk flows in the tail (due to earthward propagation of low-entropy flux tubes), we surmise that flow braking cannot by itself be the cause of the auroral breakup and subsequent expansion.

Affiliated with

Also associated with

No associations

Rating

Substorms, poleward boundary activations, auroral streamers, omega bands, and geosynchronous particle injections during a sawtooth event 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 Substorms, poleward boundary activations, auroral streamers, omega bands, and geosynchronous particle injections during a sawtooth event, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substorms, poleward boundary activations, auroral streamers, omega bands, and geosynchronous particle injections during a sawtooth event will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1471955