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- W2373598503 abstract "Convection field, field-aligned current and auroral electrojet are all very importentprocesses in the magnetosphere-ionosphere coupling. The time scale of their evolutionis about several minutes to half an hour. In this paper geomagnetic data of H andZ-component with time resolution of one minute from each 11 stations nearby 100 EGM and 300 E GM meridians are used to analyze the effect of magnetospheric disturbance on geomagnetic features of the auroral electrojet and disturbed currents inmid-and low-latitude ionospheres during a magnetic storm on April 16-17, 1994. Itis shown that the geomagnetic response of the magnetosphere-ionosphere coupling isrelated to the local time zone of the station. ms is caused by the combined effectsof the magnetospheric convection pattern and the field-aligned current systems. Duringa magnetic storm, genarally speaking, the variation of the westward auroral electrojetis the stronger one, and the auroral region may expand both poleward andequatorward. Besides, the center belt of the electrojet will move toward lower latitude.At the mid-latitude ionosphere the establishment of the region 2 field-aligned currentwill shield the disturbance caused by the region 1 field-aligned current and produce areversed current leading to a reversed geomagnetic field. These may cause a shorttime increasing of a eastward electric field at night side. As a result thesimultaneously h' F (minimum vertual height for F-region) enhancement due to theE X B drift effect will be observed at several stations nearby a meridian. On the otherhand, variations of geomagnetic field near the equator area are mainly influenced bythe ring current and the ionospheric equatorial electrojet." @default.
- W2373598503 created "2016-06-24" @default.
- W2373598503 creator A5035587316 @default.
- W2373598503 date "1999-01-01" @default.
- W2373598503 modified "2023-09-25" @default.
- W2373598503 title "GEOMAGNETIC RESPONSES TO THE CONVECTION FIELD,FIELD-ALIGNED CURRENT AND AURORAL ELECTROJET" @default.
- W2373598503 hasPublicationYear "1999" @default.
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