Ionospheric disturbances at the equatorial anomaly crest region during the March 1989 magnetic storms

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/91JA01086· OSTI ID:5073191

Huang, Yinn-Nien; Kang, Cheng ^[1]

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1. Telecommunication Training Inst., Taipei, Taiwan (China)

On March 6, 1989, the largest sunspot group since 1982 came into view as it moved out of the eastern limb of the Sun. It was highly active during March8-18, and a great many transient ionospheric and geomagnetic variations were triggered by this sunspot group. The intensive ionospheric observations at Lunping Observatory and Chungli Ionosphere Station during this period recorded 30 solar flares manifested as shortwave fade-outs, sudden frequency deviations, and solar flare effects and three storm sudden commencement (SSC)-tupe geomagnetic storms, among which the March 13 SSC-type geomagnetic storm triggered an unusually severe ionospheric disturbance. The ionospheric total electron content, the critical frequency of the F{sub 2} layer, f{sub o}F{sub 2}, and the virtual heights at given frequencies all show wavelike up-and-down oscillations of the ionosphere. This oscillatory ionospheric motion is explained as due to the compression and expansion of the plasmasphere.

• OSTI ID: 5073191
• Journal Information: Journal of Geophysical Research; (United States), Vol. 96:A8; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAGNETIC STORMS
IONOSPHERIC EFFECTS
CRITICAL FREQUENCY
DISTURBANCES
ELECTRON DENSITY
F2 LAYER
GEOMAGNETIC FIELD
IONOSPHERE
PLASMASPHERE
SOLAR FLARES
SUDDEN COMMENCEMENTS
SUNSPOTS
TRANSIENTS
VARIATIONS
VIRTUAL HEIGHT
DIMENSIONS
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
F REGION
HEIGHT
MAGNETIC FIELDS
PLANETARY IONOSPHERES
SOLAR ACTIVITY
STARSPOTS
STELLAR ACTIVITY
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena