THE GEOMAGNETIC FIELD VARIATIONS RECORDED IN VRANCEA ZONE DURING 2008-2013 AND THE SEISMIC ENERGY RELEASE

This paper discusses the use of ground magnetometer data to seismogenic zones and presents the relationship between anomalous geomagnetic variations and the occurrence of the intermediate-depth earthquakes. The present paper highlights the geomagnetic anomalies recorded at Muntele Rosu Seismological Observatory (MLR), between 2008 and 2013. To distinguish the global magnetic variations from possible seismo-electromagnetic anomalies presented in a seismic area like Vrancea zone, the data recorded on MLR were analyzed comparatively with the data recorded by the Surlari National Geomagnetic Observatory (SUA) which is located outside the Vrancea zone (150 km South-Est to Vrancea zone). Also, the geomagnetic indices taken from NOAA/Space Weather Prediction Center were plotted in order to separate these global variations caused by solar-terrestrial interaction. To highlight the relation between the geomagnetic anomalies and seismic activity of Vrancea zone, daily energy release, and total energy release calculations for each anomaly were performed.