Geomagnetic conjugacy of 30-kHz band auroral hiss emissions observed at L = 6. 1

Journal Article · Mon Jun 01 00:00:00 EDT 1987 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA092iA06p06159· OSTI ID:5993633

Sato, Natsuo ^[1]; Kokubun, Susumu ^[2]; Saemundsson, T ^[3]

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1. National Inst. of Polar Research, Tokyo (Japan)
2. Univ. of Tokyo (Japan)
3. Univ. of Iceland, Reykjavik (Iceland)

Statistical characteristics of auroral hiss emissions in the 30-kHz band were examined using the data observed simultaneously at the Syowa-Husafell conjugate pair of stations during the period of September-November 1983. The occurrence probabilities of conjugate events observed simultaneously at the two stations were almost the same in September and October and decreased during November. The nonconjugate events observed only at Syowa Station were detected more often in September. The number of nonconjugate events decreased in October and November. These phenomena were mostly observed during 1,700-2,300 MLT around the geographic midnight at Syowa. On the other hand, the number of nonconjugate phenomena detected only at Husafell in iceland incrreased from September to Noverber. The occurrence peaks were around 2,100-0200 MLT, before geographci midnight at Husafell. From these statistical characteristics it is found that auroral hiss emission occurrences strongly depend on not only the magnetic local time but also the geographic local time and seasons, suggesting that auroral hiss emissions observed on the ground are strongly controlled by the sunlit effects in the topside ionosphere.

• OSTI ID: 5993633
• Journal Information: Journal of Geophysical Research; (United States), Vol. 92:A6; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAL HISS
GEOMAGNETIC CONJUGACY
AURORAE
AURORAL ZONES
DAILY VARIATIONS
GROUND LEVEL
IONOSPHERE
SEASONAL VARIATIONS
SOLAR RADIATION
STATISTICS
TIME DEPENDENCE
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
LEVELS
MATHEMATICS
PLANETARY IONOSPHERES
RADIATIONS
STELLAR RADIATION
VARIATIONS
661320* - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)