1. ISTerre; Universite de Savoie, CNRS; Le Bourget-du-Lac France
2. Geology and Geophysics Department; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USA
3. Department of Geology; Portland State University; Portland Oregon USA
4. U.S. Geological Survey; Menlo Park California USA
5. Department of Earth and Planetary Science; University of California; Berkeley California USA
6. Department of Geophysics; Stanford University; Stanford California USA