资源环境科技发展态势分析平台

We use Magnetospheric Multiscale (MMS) data to investigate the energy dissipation in a magnetopause reconnection electron diffusion region event with moderate guide field. The four MMS spacecraft were separated by about 10 km so that comparative study among spacecraft within the electron diffusion region can be implemented. Similar magnetic field and electric current properties at each spacecraft indicate the formation of a quasi-homogeneous magnetic and current structure in the diffusion region. However, we find that the energy dissipations detected by each spacecraft are still different due to the temporal or spatial effect of the out-of-plane reconnection electric field () within the dissipation region. Our study suggests that the non-uniform or unsteady energy dissipation in the reconnection electron diffusion region may be a universal process.