1. Lithosphere Fluid Research Laboratory; Eötvös Loránd University; Budapest Hungary
2. Instituto Andaluz de Ciencias de la Tierra; CSIC and UGR; Granada Spain
3. Geological and Geophysical Institute of Hungary; Budapest Hungary
4. Now at Geodetic and Geophysical Institute; MTA Research Centre for Astronomy and Earth Sciences; Sopron Hungary
5. Géosciences Montpellier, Université de Montpellier and CNRS; Montpellier France
6. Geodetic and Geophysical Institute; MTA Research Centre for Astronomy and Earth Sciences; Sopron Hungary