1. Istituto Nazionale di Geofisica e Vulcanologia Rome Italy
2. Dipartimento di Fisica e Scienze della TerraUniversità di Parma Parma Italy
3. Research School of Earth SciencesThe Australian National University Canberra Australia
4. Antarctic Research CentreVictoria University of Wellington Wellington New Zealand
5. School of Earth and Environmental SciencesQueens College Flushing New York USA
6. Lamont‐Doherty Earth ObservatoryColumbia University New York New York USA