Study of long-wave radio signal disturbances due to lightning-induced energetic electron precipitation

Abstract

Observing long-wave radio signals at short distances simultaneously with the broadband reception of VLF radiations, we obtained an abrupt (by more than 10%) amplitude variation of signals from the Moscow long-wave transmitter which can be identified as the reflection of long-wave signals from lightning-induced energetic electron precipitation regions in the ionosphere. Some amplitude variation events were accompanied by single-hop whistlers which arrived from the southern hemisphere and multihop whistlers originating from the northern hemisphere.