Latitudinal Effect of Disturbance during Magnetic Storm on April 6, 2000 at Chinese Low‐Latitude Meridian Chain Stations

Abstract Latitude effect of geomagnetic disturbances during the geomagnetic storm on April 6, 2000 is analyzed by using minute average of H and D components at a low‐latitude geomagnetic meridian chain stations. The main characteristics are as follows. (1) SC range of H component decreases and the decreasing rate increases with decreasing latitudes during sudden commencement; (2) The range of the second peak for H component and the duration of the initial phase decrease with decreasing latitudes in the initial phase; (3) H component decreases speedily and the range of variation increases with decreasing latitudes in the main phase; (4) The H component increases by two steps in the recovery phase. H component increases quickly and the increasing range decreases with decreasing latitudes at the former step. The increasing rate of H component decreases at the later step. Finally, the intimate relationship between the latitudinal effect of the geomagnetic storm and the space current system is discussed.