1. School of Computer Science Tel Aviv University Ramat Aviv 69978, Israel & Company Paradigm Geophysical Ltd Herzlia, 46120, Israel Tel: Fax:
2. Company Paradigm Geophysical Ltd Herzlia, 46120, Israel Tel: Fax:
3. Dept. of Earth and Planetary Sciences Tel Aviv University Ramat Aviv 69978 Israel Company Paradigm Geophysical Herzlia, 46120 Israel Tel: Fax: