DAYTIME MEASUREMENTS OF OPTICAL AURORAL EMISSIONS FROM ANTARCTICA

Citation
R. Sridharan et al., DAYTIME MEASUREMENTS OF OPTICAL AURORAL EMISSIONS FROM ANTARCTICA, Current Science, 68(8), 1995, pp. 830-834
Citations number
11
Categorie Soggetti
Multidisciplinary Sciences
Journal title
ISSN journal
00113891
Volume
68
Issue
8
Year of publication
1995
Pages
830 - 834
Database
ISI
SICI code
0011-3891(1995)68:8<830:DMOOAE>2.0.ZU;2-J
Abstract
Optical methods have enabled us to detect auroral emissions during day time conditions, and to identify a narrow latitudinal region of energe tic particle precipitation from the Indian station Maitri (11-degrees- 38'E; 70-degrees-45'S; 62.8-degrees-S I-lat.) in Antarctica. These obs ervations are new. The energetic particles originate within the closed geomagnetic field lines close to the plasmapause region and maximize approximately 0830 h MLT (Magnetic Local Time) (approximately 1200 UT) . Enhanced proton precipitation activity could also be inferred during a moderate geomagnetic storm, suggesting the enhancement/activation o f acceleration mechanisms during this event.