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- W1497472514 abstract "By analyzing ground-based optical observations at Zhongshan, Antarctica, several results can be obtained. Most of the bright spots have a vortex structure, and they are rather transient features lasting typically for only a few minutes (some last less than 30 s). The typical size of the spots is about 100-300 km. The intensity of the bright spots of 557.7 nm emissions can surpass 13 kR. The occurrence of the bright spots seems rather frequent and favors low magnetic activity. Usually the bright spots are accompanied by multi-band arcs and most arcs move poleward. The latitudinal extent of the arcs can surpass 300 km, the intensification of the spot is mainly caused by an enhanced middle level energy (3∼10 keV) flux, the occurrence height of the bright spot is about 150 ∼200 km. Ground-based observations confirms the existence of auroral intensification between 1400 and 1700 MLT. Magnetic pulsations occurred in conjunction with bright spots. The pulsations had periods of 41, 20.8, 10.4 and 5.2 minutes, with the short periods corresponding to those of the PMAFS in the noon sector." @default.
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- W1497472514 date "2003-01-01" @default.
- W1497472514 modified "2023-09-27" @default.
- W1497472514 title "Observations of postnoon auroral bright spots with high temporal and spatial resolution at Zhongshan Station, Antarctica" @default.
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- W1497472514 doi "https://doi.org/10.1029/133gm37" @default.
- W1497472514 hasPublicationYear "2003" @default.
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