Institution: | Bundesanstalt für Geowissenschaften und Rohstoffe, PO Box 510153, D-30631 Hannover, Germany;Institute of Physics of the Earth, Russian Academy of Sciences, 123810 D-242, Moscow, Russia;Institute of Geomagnetism and Aeronomy, St Petersburg Branch, 199053, St Petersburg, Russia;All Russian Petroleum Research and Geological Exploration Institute (VNIGRI) 191104 St Petersburg, Russia. E-mail: khram@oloy.spb.su;Institute of Geophysics, Polish Academy of Sciences, 01-452 Warsaw, ks. Janusza, 64, Poland;Geophysical Institute, Academy of Sciences, G. Bonchev str. 3, 113, Sofia, Bulgaria;Institute of Geology, Academy of Sciences, Karelian Branch. 185610 Petrozavodsk, Russia |