Magnetic and ionospheric electric fields

The Earth has the region dominated by its magnetic field, called magnetosphere. In the magnetosphere, large-scale magnetic disturbance phenomena such as storms and substorms are observed by the input of energy from solar wind. These phenomena are triggered by convection electric fields that cause the transport and acceleration of charged particles and electromagnetic energies in the magnetosphere. Therefore, investigating evolution of convection electric fields is essential to understand the energy transport associated with solar wind disturbance in the magnetosphere-ionosphere coupled system. Currently, we are trying to clarify evolution of convection electric fields and the energy transport associated with magnetic disturbance phenomena by the in-situ multiple observations of magnetic and ionospheric electric fields – using by THEMIS, RBSP, SuperDARN, and etc.