Open AccessInvestigation of the conjugacy between auroral breakup and energetic electron injection
Author(s) -
Lazutin L. L.,
Borovkov L. P.,
Kozelova T. V.,
Kornilov I. A.,
Tagirov V. R.,
Korth A.,
Stadsnes J.,
Ullaland S.
Publication year - 2000
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2000ja900031
Subject(s) - substorm , electron , geophysics , physics , equator , latitude , electron precipitation , local time , van allen radiation belt , breakup , geology , proton , solstice , magnetic field , magnetosphere , astronomy , nuclear physics , mechanics , statistics , mathematics , quantum mechanics
Auroral TV observations at Loparskaya, Kola Peninsula, and CRRES energetic electron and proton measurements during a moderate isolated substorm at 2000–2100 UT on February 13, 1991, are compared. The CRRES was at the apogee of orbit 494 in the outer radiation belt near the magnetic equator. CRRES footprint projection estimated by using a Tsyganenko magnetic field model was situated at the same latitudes several degrees eastward of active aurora during the substorm breakup or the intensification. The intensification consists of several activations of 1‐min duration, and this fine spatial and temporal structure is important for the conjugacy investigations. It is shown that injected energetic electrons have been accelerated at the same time as one of the auroral activations at the same latitude and approximately the same azimuthal extended region. The lack of enhanced electrons during other activations suggests that the acceleration region has a sharp equatorial boundary.