Mathematics – Logic
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..115f&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 14, Feb. 1987, p. 115-118. Research supported by the Japanese Ministry of Ed
Mathematics
Logic
15
All Sky Photography, Auroras, Conjugate Points, Geomagnetism, Pulsed Radiation, Electron Precipitation, Television Cameras, Temporal Distribution
Scientific paper
Simultaneous observations of pulsating auroras were carried out in September, 1984, using all-sky TV cameras at a geomagnetically conjugate pair of stations; Soyowa Station in Antarctica and Husafell in Iceland. From the data obtained at the two places on 26 September, the following characteristics are found: Spatial configuration of pulsating auroras is very similar in the conjugate regions. In this particular event each pulsating aurora has its counterpart with topologically the same shape in the other hemisphere. However, the timing of the appearance or fade-out of the pulsating auroras depends on the type of aurora. That is, the patchy type of aurora appears nearly simultaneously in both hemispheres, but the expansion type of pulsating aurora, extending from an aurora with much slower variations, is not synchronously observed and often appears almost out of phase between the conjugate regions.
Fujii Ryoichi
Fukunishi Hiroshi
Hirasawa Takeo
Ono Takafumi
Sato Naoko
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