Using the data of LANL and Cluster C4 satellites during the magnetic storms of September 13, 2004, and October 21, 2001, we investigate the relationship between energetic electron flux evolution and chorus waves near the geostationary orbit. In these two cases, enhancement in energetic electron flux and obvious chorus wave activities are observed. The flux enhancement is correlated positively with the power spectrum density of the chorus waves. Such correlated observation presents a new evidence for t...