DISTURBANCES OF THE ATMOSPHERIC ELECTRIC FIELD DURING THE MAGNETIC STORM ON APRIL 5, 2010

The problem of atmospheric electric field disturbances during geomagnetic field variations still has no clear solution. The article analyzes available data from magnetometers and atmospheric electricity stations during the supersubstorm of April 5, 2010, which developed against the background of a moderate magnetic storm (/Dst/ ~ 80 nT). Comparison of fluxmeter and magnetometer data has shown unexpectedly strong variations in the vertical electric field Ez with a range of up to several hundred V/m (“electric storm”) during intense magnetic disturbances. Although the Ez disturbance observed worldwide roughly coincided with the magnetic storm, the coherence between the geomagnetic and electrical variations and the electrical variations between themselves was low. This event does not fit into modern concepts of atmospheric electric field disturbances by ionospheric currents.