Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10629037s&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue A12, p. 29037-29050
Physics
4
Ionosphere: Equatorial Ionosphere, Ionosphere: Plasma Convection, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Storms And Substorms
Scientific paper
Ionospheric convection enhancement with high westward velocities exceeding 1500 m s-1 was observed in association with the particle injection event by SuperDARN in the dusk sector of the auroral zone. Such a convection enhancement could be attributable to the enhanced sunward plasma flows in the dusk sector of the magnetosphere. At the dip equator a ground Pi2 onset was found to occur in association with these convection transients. The onset of the Pi2 lagged behind the convection enhancement by 4-11 min. It is argued that the convection transient could be the earliest indicator of the substorm onset among energetic particle injection, low-latitude Pi2 onset, and, perhaps, the auroral breakup.
Greenwald Ray A.
Kitamura Takao
Ruohoniemi Michael J.
Saka O.
Sato Naoko
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