Longitudinal effects on the eigenfrequencies of low-latitude Pc 3 pulsations

Journal Article · Sun Mar 01 00:00:00 EST 1987 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA092iA03p02535· OSTI ID:5510625

Sutcliffe, P R; Hattingh, S K.F.; Boshoff, H F.V. ^[1]

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1. Council for Scientific and Industrial Research, Hermanus (South Africa)

Pc 3 pulsations were recorded at three stations along the L {congruent} 1.78 shell and spanning 35{degree} in longitude during July 1983. The pulsations recorded at Gough Island (10{degree}W) had higher frequencies than those recorded at two stations in South Africa (20{degree}E and 25{degree}E). Local time effects or small differences in the magnetic field configuration do not account for the differences in resonant frequency. The authors conclude that the higher pulsation frequency at Gough Island is due to a lower plasma mass density on that field line relative to the others and that oxygen plays a significant role. Factors which may contribute to the lower plasma mass density are the lower rate of production of O{sup +} by solar ultraviolet radiation, F region heating by energetic particle precipitation, and the greater loss of O{sup +} caused by meridional winds.

• OSTI ID: 5510625
• Journal Information: Journal of Geophysical Research; (United States), Vol. 92:A3; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH MAGNETOSPHERE
HYDROMAGNETIC WAVES
EIGENFREQUENCY
CHARGED-PARTICLE PRECIPITATION
DATA ACQUISITION
DATA ANALYSIS
F REGION
GEOMAGNETIC FIELD
INTERPLANETARY MAGNETIC FIELDS
MAGNETIC FIELD CONFIGURATIONS
MONITORING
OXYGEN IONS
PLASMA DENSITY
PLASMA HEATING
PULSATIONS
SOLAR RADIATION
VARIATIONS
CHARGED PARTICLES
EARTH ATMOSPHERE
HEATING
IONOSPHERE
IONS
MAGNETIC FIELDS
PLANETARY IONOSPHERES
RADIATIONS
STELLAR RADIATION
661320* - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)