● Geomagnetism
- secular variation of the main geomagnetic field (measurements in repeat stations, analysis of the solar cycle variation);
- mantle electrical conductivity from long-term geomagnetic variations.
● Heat flow:
- modelling fluid flow thermal effects in the foreland of the Eastern Carpathians bend.

PUBLISHED PAPERS:
Demetrescu, C., Dobrica, V., 2003, On the electric properties of rocks under the network of European geomagnetic observatories as derived from series of annual means of geomagnetic elements, Romanian Reports in Physics, vol. 3, nr. 55.
Demetrescu, C., Wilhelm, H., Ene, M., Andreescu, M., Polonic, G., Baumann, C., Dobrica,V., Serban, D. Z., 2005, On the geothermal regime of the foreland of the Eastern Carpathians bend, Journal of Geodynamics, 39, 29-59.
Demetrescu, C., Dobrica, V., 2005, Recent secular variation of the geomagnetic field. New insights from long series of observatory data. Rev. Roum. Geophys., 49, 22-33.
Demetrescu, C., Wilhelm, H., Tumanian, M., Damian, A., Dobrica, V., Ene, M., 2007, Time dependent thermal state of the lithosphere in the foreland of the Eastern Carpathians bend. Insights from new geothermal measurements and modeling results, Geophys. J. International, doi: 10.1111/j.1365-246X.2007.03408.x.
Demetrescu, C., Dobrica, V., 2008, Signature of Hale and Gleissberg solar cycles in the geomagnetic activity, J. Geophys. Res., 113, A02103, doi:10.1029/2007JA012570.
Dobrica, V., Demetrescu, C., Boroneant, C., Maris, G., 2008, Solar and geomagnetic activity effects on climate at regional and global scales: Case study – Romania, J. Atmos. Solar-Terr. Phys., doi:10.1016/j.jastp.2008.03.022.
Dobrica, V., Mogi, T., Demetrescu, C., Takada, M., 2009, Magnetic induction effects of the diurnal variation. Case study-the Hokkaido magnetometric array, Revue Roumaine de Geophysique, 52-53, 33-47.
Demetrescu, C., Dobrica, V., Maris, G., 2010, On the long-term variability of the heliosphere-magnetosphere environment, Adv. Space Research, 46, 1299-1312.