Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3755s&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 20, p. 3755-3758
Physics
10
Ionosphere: Auroral Ionosphere, Ionosphere: Particle Precipitation, Ionosphere: Wave/Particle Interactions, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions
Scientific paper
Simultaneous TV data of pulsating auroras were obtained at two nearly conjugate stations, Husafell in Iceland and Syowa in Antarctica on September 9-10, 1994. An investigation of the spatial and temporal coherence of pulsating patches revealed the following characteristics: (1) The overall dynamic variations and activities of the pulsating features were very similar at both stations. (2) Most of the individual pulsating patches did not have clear counterparts in the opposite hemisphere. That is, individual pulsating patches appeared to be nonconjugate. (3) Even when the shape and type of pulsating aurora suggested a conjugate-like relationship, the pulsation periods were clearly different. These interesting results indicate an asymmetry in the generation or precipitation mechanism of the particles producing pulsating auroras. Active ionospheric processes probably play an important role in causing or modifying auroras of this type.
Minatoya Kouichi
Morooka Michiko
Saemundsson Thorsteinn
Sato Natsuo
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