The authors are grateful to Japanese WDC-C2 KY0T0 AE index service for presenting AU,AL and AE indices and to Goddard Space Flight Center,NASA for presenting data of the interpanaetary condition and auroradata.Thanks are also given to Cluster and Double-Star Data Center for providing data used in the study.This work was supported by the National Natural Science Foundation of China(Grant No.40390152);the State Key Basic Research Program(Grant No.G200000784);the XK100010404 of Beijing City,and the Space Weather Laboratory,Center for Space Science and Applied Research,CAS.
supported by the National Key Foundation Research Project(Grant No.G1998040815);the National Natura1 Science Foundation of China(Grant No.40171010);the Key Project of Ministry of Education and the Teaching and Research Award Program for Outstanding Young Teachers
In the east of Xiaolangdi, many river terraces are developed at the exit of the Yellow River Gorges. Among them the terraces in Kouma, Yanshi of Henan Province are most typical, where the Yellow River developed three ...