A disturbance in the outer geomagnetic variation field in connection with atmospheric atomic explosions in middle latitudes

Abstract

It is known that as a consequence of atmospheric atomic explosions an enhancement of the D layer absorption by energetic electron precipitation occurs (Lauter et al. 1977). It is shown that simultaneously with the absorption enhancement there is observed a disturbance of the geomagnetic variation field. The equivalent current system appertaining to this magnetic field disturbance is derived. This new component of the geomagnetic variation field is designated DM variation.