Geomagnetic responses in high latitudes during the storm of July 15—16, 2000  

作　　者：陈耿雄 杜爱民 徐文耀 陈鸿飞 洪明华 彭丰林 师恩齐 

机构地区：[1]Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100101, China

出　　处：《Science China Mathematics》2002年第z1期132-141,共10页中国科学：数学（英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 49734140); the National Foundation Research Fund (No G2000078406).

摘　　要：The ionospheric equivalent currents in the high latitudes and the auroral electrojet sys- tem during the geomagnetic storm on July 15-16, 2000 are analyzed by using geomagnetic data from IMAGE chain. The large-scale vortices of equivalent currents are observed in the storm. The vortices on the dusk side of ionosphere correspond to four-celled pattern of plasma convection associated with NBZ, region I and region II field-aligned currents. Only one vortex can be found on the dawn side of ionosphere after interplanetary magnetic field (IMF) turns southward. In the initial phase of the storm, the center of eastward electrojets tends to shift equatorward. It arrives at 58.62 latitude of corrected geomagnetic coordinates (CGM). The westward electrojets are strong in the main phase. The center of westward electrojets in this period moves equatorward and may be beyond the southernmost station (56.45°) of the chain.The ionospheric equivalent currents in the high latitudes and the auroral electrojet system during the geomagnetic storm on July 15-16, 2000 are analyzed by using geomagnetic data from IMAGE chain. The large-scale vortices of equivalent currents are observed in the storm. The vortices on the dusk side of ionosphere correspond to four-celled pattern of plasma convection associated with NBZ, region I and region II field-aligned currents. Only one vortex can be found on the dawn side of ionosphere after interplanetary magnetic field (IMF) turns southward. In the initial phase of the storm, the center of eastward electrojets tends to shift equatorward. It arrives at 58.62o latitude of corrected geomagnetic coordinates (CGM). The westward electrojets are strong in the main phase. The center of westward electrojets in this period moves equatorward and may be beyond the southernmost station (56.45°) of the chain.

关 键 词：magnetic storm  field-aligned current  EQUIVALENT current  auroral electrojet. 

分 类 号：P182[天文地球—天文学]