DC electric field formation in the mid-latitude ionosphere over typhoon and earthquake regions

The further development of electrodynamic model of strong DC electric field formation in the ionosphere above typhoon and earthquake regions has been presented. According to this model, the external electric current works as a source of conductivity current perturbation in the atmosphere–ionosphere electric circuit. The origin of such a current is connected with upward transportation of charged water drops and aerosols in hurricane convection zone and convection of charged aerosols, which are injected in the atmosphere by elevation of soil gases in the ground of seismic region. This paper presents the method for calculation of the electric field in the atmosphere and the ionosphere generated by given distribution of external electric current in the atmosphere. Calculations of spatial distribution of DC electric field in the ionosphere were carried out with the account of oblique geomagnetic field and the conjugate ionosphere effects.