1. Institutionen för geologiska vetenskaperStockholms universitet Stockholm Sweden
2. Deutsches GeoForschungsZentrum GFZ Potsdam Germany
3. Université de Paris, Institut de Physique du Globe de Paris, CNRS Paris France
4. School of Earth SciencesVictoria University Wellington New Zealand
5. School of Earth and Environmental SciencesQueens College New York NY USA