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.