rhe role of waves in the dynamics of the Earth's magnetospbere has long been an interesting topic. Here we concentrate on one event when a bell-studied Coronal Mass Ejection struek the Earth on January 10. 1997. as GEOTAIL skimmed along the dayside magnetopetld observed 3-dimensional multiple x-line magnetic rconnec ion. Electrostatic Solitary Waves (ESW) and Amplitude Modulated Electrostatic Waves (AMEW) were detected associated with reconneetion, The ESW had amplitudes up to-2OmV/m. The ESW evolved from two-dimensional structures with smaller amplitudes to one-dimensional structures with larger amplitudes The observation ofESW and AMEW clearly show that the enhanced broadband electrostatic emissions 0ssocialed with reconnection are not random noises btg have coherent structures, The nonlinear coherent structures provide important disstpation in the eleatron diffusion region during magnetic reconnection