1. Department of Geophysics, Tel Aviv University, Tel Aviv, Israel 69978 and Paradigm Geophysical Ltd., Beit Merkazim, P.O. Box 2061, Herzlia, Israel
2. Geophysical Development Corporation, 8401 Westheimer, Suite 150, Houston, TX 77063
3. Paradigm Geophysical Ltd., Beit Merkazim, P.O. Box 2061, Herzlia, Israel