Institution: | Institute of Geophysics, National Academy of Sciences of Ukraine, POB-70;, Kiev-146, Ukraine. E-mail: Solid Earth Physics Institute, University of Athens, Panepistimiopolis, Zografos 157 84;, Athens, Greece. E-mail: Solid State Section, Department of Physics, University of Athens, Panepistimiopolis, Zografos 157 84;, Athens, Greece E-mail: |