Daytime measurements of optical auroral emissions from Antarctica

Sridharan, R. ; Pallam Raju, D. ; Narayanan, R. ; Modi, N. K. ; Subbaraya, B. H. ; Raghavarao, R. (1995) Daytime measurements of optical auroral emissions from Antarctica Current science, 68 (8). pp. 830-834. ISSN 0011-3891

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Optical methods have enabled us to detect auroral emissions during daytime conditions, and to identify a narrow latitudinal region of energetic particle precipitation from the Indian station Maitri (11° 38'E; 70°45'S; 62.8°S I-lat.) in Antarctica. These observations are new. The energetic particles originate within the closed geomagnetic field lines close to the plasmapause region and maximize ~0830 h MLT (Magnetic Local Time) (~1200 UT). Enhanced proton precipitation activity could also be inferred during a moderate geomagnetic storm, suggesting the enhancement/activation of acceleration mechanisms during this event.

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