30th URSI Convention on Radio Science, Sodankylä, Finland, 9-10 October 2006

ELF-VLF Measurements at SGO

J. Manninen, T. Turunen, Th.Ulich

Sodankylä Geophysical Observatory, Sodankylä, Finland


Sodankylä Geophysical Observatory has carried out ELF-VLF recordings since 1970s. The equipment has been developed and built at SGO. At the moment there are three different generations of wideband ELF-VLF receivers for measurement campaigns in addition to another receiver belonging to the British Antarctic Survey for continuous recordings. Furhtermore one receiver monitors VLF signals from 6 transmitters around the world, while another receiver is part of the World Wide Lightning Location Network.

Most of the recordings have been made during special campaigns, which were related to EISCAT and auroral measurements. In many cases the data has shown totally novel events and all the time new findings are made.

The analysis software has also been made at SGO. Some examples will be shown.