Abstract
A statistical study of the properties of ions (O+, He+ and H+) measured by the Cluster-II in cusp region as a function of the solar wind dynamic pressure and geomagnetic index Kp respectively was made during the summer and fall of 2001–2003. The main results are that: (1) O+ ion density responds in a significant way to geomagnetic index Kp, and He+ ion density is not correlated with geomagnetic index Kp, both of them have a significant positive correlation with solar wind dynamic pressure; (2) H+ ion density is also observed to increase with solar wind dynamic pressure, and not correlated with geomagnetic index Kp.
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Supported by the National Natural Science Foundation of China (Grant Nos. 40621003, 40674091 and 40523006) and the International Collaboration Research Team Program of the Chinese Academy of Sciences
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Guo, J., Shi, J., Zhang, T. et al. The correlations of ions density with geomagnetic activity and solar dynamic pressure in cusp region. CHINESE SCI BULL 52, 967–971 (2007). https://doi.org/10.1007/s11434-007-0133-0
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DOI: https://doi.org/10.1007/s11434-007-0133-0