Results of monitoring the geomagnetic variations at the Magadan and Paratunka observatories

Abstract

We analyze the magnetic tensor and tipper data in the interval of periods from a few minutes to a few hours for the geomagnetic time series of 2007–2008. The frequency responses, the polar diagrams, and the real and imaginary induction arrows which reflect the effects of geoelectric heterogeneities are calculated. The monitoring of the tipper and tensor data series revealed the annual variations in these parameters, which are caused by the changes in the electric conductivity of the lithosphere. The anomalous variations identified in the behavior of the magnetic tipper and tensor are probably due to earthquakes with M ≥ 6.3.